View source for Satoshi Ishii

{{Short description|Japanese-Croatian mixed martial arts fighter and judoka (born 1986)}}
{{Infobox martial artist
| name            = Satoshi Ishii <br> 石井慧
| other_names     =
| image           = Ishii Satoshi 2008.jpg
| image_size      = 200px
| alt             =
| caption         =
| birth_name      =
| birth_date      = {{Birth date and age|1986|12|19}}
| birth_place     = [[Ibaraki, Osaka|Ibaraki]], [[Osaka]], Japan
| death_date      =
| death_place     =
| death_cause     =
| residence       = [[Zagreb]], Croatia
| nationality     = Croatian <small>(2019–present)</small> <br> Japanese <small>(1986–2019)</small>
| height_ft       = 5
| height_in       = 11
| weight_lb       = 240
| weight_class    = [[Light heavyweight (MMA)|Light Heavyweight]] <br> [[Heavyweight (MMA)|Heavyweight]]
| reach           = 74 in
| style           = [[Judo]]
| fighting_out_of = Zagreb, Croatia
| team            = Cro Cop Squad Gym <br> [[Kings MMA]] <br> Reign Training Center <br> [[Black House (MMA)|Black House]] <br> i Dash (2009–2010)
| rank            = 
| years_active    = 2004–2009, 2011 (Judo)<br>2009–2024 (MMA)<br>2021–2024 (Kickboxing)<br> 2022–2024 (Boxing)
| box_win          = 1
| box_kowin        = 
| box_loss         = 0
| box_koloss       = 
| box_draw         = 1
| box_nc           = 
| mma_kowin       = 3
| mma_subwin      = 12
| mma_decwin      = 10
| mma_koloss      = 6
| mma_subloss     = 
| mma_decloss     = 7
| mma_draw        = 1
| mma_nc          =
| kickbox_win     = 3
| kickbox_kowin   = 1
| kickbox_loss    = 1
| kickbox_koloss  = 
| kickbox_draw    = 
| kickbox_nc      = 
| am_win          = 
| am_kowin        =
| am_subwin       = 
| am_loss         = 
| am_koloss       = 
| am_subloss      = 
| am_draw         = 
| am_nc           =
| url             = 
| sherdog         = 41887
| boxrec          = 1096490
| footnotes       =
| module2 = {{Infobox judoka
| embed        = yes
<!-- Sport -->
| weight_class = {{nbnd}}100&nbsp;kg, +100&nbsp;kg
| rank_ref     = 
| dan          = 6
| club         = 
<!-- Achievements and titles -->
| olympics_rank    = 1
| olympics_year    = 2008
| olympics_weight  = Men's +100 kg
| worlds_rank      = <!-- 1\2\3\5\7\R16\etc... -->
| worlds_year      = 
| worlds_weight    = <!-- Optional – To link to specific weightclass competition article (when one exists) -->
| regionals_type   = AS
| regionals_rank   = 2
| regionals_year   = 2006
| regionals_weight = Men's 100 kg
| nationals        = 
<!-- Medal record -->
| show-medals    = 
| medaltemplates =
{{Medal|Sport| Men's [[judo]] }}
{{Medal|Country| {{JPN}} }}
{{Medal|Competition| [[Judo at the Summer Olympics|Olympic Games]] }}
{{Medal|G| [[Judo at the 2008 Summer Olympics|2008&nbsp;Beijing]] | [[Judo at the 2008 Summer Olympics – Men's +100 kg|+100&nbsp;kg]] }}
{{Medal|Competition| [[Judo at the Asian Games|Asian Games]] }}
{{Medal|S| [[Judo at the 2006 Asian Games|2006&nbsp;Doha]] | [[Judo at the 2006 Asian Games – Men's 100 kg|{{nbnd}}100&nbsp;kg]] }}
{{Medal|Competition| [[World Judo Juniors Championships|World Juniors Championships]] }}
{{Medal|G| [[2004 World Judo Juniors Championships|2004&nbsp;Budapest]] | {{nbnd}}100&nbsp;kg }}
{{Medal|Competition| [[Asian Junior Judo Championships|Asian Junior Championships]] }}
{{Medal|G| [[2004 Asian Junior Judo Championships|2004&nbsp;Doha]] | {{nbnd}}100&nbsp;kg }}
{{Medal|Competition| [[Judo at the Summer World University Games|Summer Universiade]] }}
{{Medal|G| [[Judo at the 2007 Summer Universiade|2007&nbsp;Bangkok]] | Open }}
}}
| updated         =
}}

{{nihongo|'''Satoshi Ishii'''| {{Langx|ja| 石井 慧}} |Ishii Satoshi|born December 19, 1986}} is a Japanese-Croatian retired [[Mixed martial arts|mixed martial artist]], [[kickboxer]], [[professional boxer]] and [[judoka]] who has held Croatian citizenship since 2019.

Ishii won the [[gold medal]] in [[Judo at the Summer Olympics|Olympic Judo]] at the Beijing [[Judo at the 2008 Summer Olympics – Men's +100 kg|2008 Summer Olympics]], a [[silver medal]] at the [[Judo at the 2006 Asian Games – Men's 100 kg|2006 Asian Games]] and two [[All-Japan Judo Championships]] representing [[Japan]]. Ishii made his professional MMA debut at ''[[Dynamite!! 2009]]'' losing to fellow Judoka gold medalist [[Hidehiko Yoshida]] by unanimous decision, but currently holds a record of 24–12–1.<ref>{{Cite web|url=https://www.tapology.com/fightcenter/fighters/satoshi-ishii|title=Satoshi Ishii {{!}} MMA Fighter Page {{!}} Tapology|website=Tapology|language=en|access-date=2018-12-03}}</ref> Ishii is currently under contract with [[Professional Fighters League]].<ref name=pflsign>{{cite web|url=https://mmajunkie.com/2019/01/japanese-heavyweight-satoshi-ishii-says-he-has-signed-with-pfl|title=Japanese heavyweight Satoshi Ishii says he has signed with KSW and PFL|publisher=mmajunkie.com|date=January 1, 2019}}</ref> A professional mixed martial artist since 2009, Ishii has also competed for [[Rizin Fighting Federation]] and [[Bellator MMA|Bellator]], and is the current HEAT Heavyweight Champion and SBC Heavyweight Champion.

==Judo career==
[[File:Ishii vs Suzuki 2008.jpg|thumb|left|200px|Ishii vs. [[Keiji Suzuki]] in 2008.]]
Ishii started Judo under the guidance of his father when he was in fifth grade of elementary school. He attended Kokushikan High School and then [[Kokushikan University]] in the Department of Physical Education.<ref>{{cite web|url=https://sawasaura.net/2019/07/03/isiisatoshi/|title=石井慧の現在!国籍もクロアチア?元妻は林明日香で離婚2回?彼女は柔術世界女王?|date=3 July 2019|publisher=sawasaura.net}}</ref>

Ishii won a gold medal at the [[2004 World Judo Juniors Championships|Junior World Championships]] on 16 October 2004 in [[Budapest]], Hungary. On 2 December 2006 he won a silver medal at the [[Judo at the 2006 Asian Games – Men's 100 kg|{{nbnd}}100&nbsp;kg category]] of the [[Judo at the 2006 Asian Games|2006 Asian Games]].<ref>{{cite web |title=第15回アジア競技大会柔道競技(06.11.3) |url=https://www.judo.or.jp/tournament/7170/ |website=judo.or.jp |date=December 2006 |access-date=29 October 2021}}</ref> On April 29, 2006, and 2008, he won the [[All-Japan Judo Championships]] in Tokyo, Japan.<ref>{{cite news |title=全日本柔道選手権で石井慧が優勝、最後の五輪代表の座を勝ち取る |url=https://jp.reuters.com/article/idJPJAPAN-31567520080429 |website=jp.reuters.com |date=29 April 2008 |access-date=29 October 2021}}</ref> With him the Japanese team won the [[2007 World Team Judo Championships|World Judo team competition]] on 17 November 2007 in Beijing, China, this time in the +100&nbsp;kg division.

On August 15, 2008, he won a gold medal at the [[Judo at the 2008 Summer Olympics – Men's +100 kg|+100&nbsp;kg category]] of the [[Judo at the 2008 Summer Olympics|Beijing 2008 Summer Olympics]].<ref>{{cite news |title=日本选手石井慧获男子柔道100公斤以上级冠军 |url=https://www.reuters.com/article/idCNChina-2037320080815 |website=reuters.com |date=15 August 2008 |access-date=29 October 2021}}</ref>

On 30 April 2011 Ishii returned to Judo to compete in the United States Championship in the open division; he won all the matches, securing the gold medal.<ref>{{cite web |title=石井慧 柔道復帰いきなりＶ！決勝は９秒１本！！ |url=https://www.sponichi.co.jp/battle/news/2011/05/01/kiji/K20110501000735500.html |website=sponichi.co.jp |access-date=29 October 2021}}</ref>

==Mixed martial arts career==
===Early career===
After winning the gold medal, Ishii expressed his wishes to apply his talents in the sport of mixed martial arts (MMA) to the dismay of the Japanese Judo Federation.<ref>{{cite web
 |title       = Enfant terrible Ishii two-times Japanese judo
 |url         = http://afp.google.com/article/ALeqM5gQfvaF-3NwnP4y5iLwUWcT48rb1g
 |agency      = [[Agence France-Presse|AFP]]
 |date        = October 8, 2008
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20081011155902/http://afp.google.com/article/ALeqM5gQfvaF-3NwnP4y5iLwUWcT48rb1g
 |archive-date = October 11, 2008
}}</ref> Ishii originally confirmed that he signed a contract with Japanese MMA promotion [[Fighting and Entertainment Group]] (FEG) and was rumored to debut in early 2009 in their fight series, [[DREAM (mixed martial arts)|DREAM]].<ref name="MMAmania">{{cite web|url=http://mmamania.com/2008/10/29/olympic-judo-gold-medalist-satoshi-ishii-signs-with-feg/ |title=Olympic Judo gold medalist Satoshi Ishii signs with FEG |date=October 29, 2008 |work=MMAmania.com |first=Stefan |last=Manojlovic |access-date=October 29, 2008}}</ref>

Japanese newspaper ''Sports Nippon'' then reported that Ishii would make his ring debut on December 31, 2009, at the annual ''[[K-1 Premium Dynamite!!]]'' event at the [[Saitama Super Arena]]. However, Ishii announced that he rejected FEG's offer, and was planning to pursue his MMA career in the US' [[Ultimate Fighting Championship]] (UFC). He headed to Florida where he trained with one of MMA's top camps [[American Top Team]].<ref>[http://mmamania.com/2008/12/17/olympic-judo-gold-medalist-satoshi-ishi-headed-for-american-top-team/ Olympic Judo gold medalist Satoshi Ishi headed for American Top Team], MMA Mania, 17 December 2007</ref>

On June 1, 2009, Ishii announced he would join Japanese MMA organization [[World Victory Road]].<ref>[http://sherdog.com/news/news/ishii-signs-with-sengoku-17728 Ishii Signs with Sengoku]. Sherdog.com. Retrieved on 2010-09-28.</ref> He officially signed with the organization at a public signing event on June 4, 2009.<ref>Holland, Jesse. (2009-06-01) [http://mmamania.com/2009/06/01/olympic-gold-medalist-satoshi-ishii-passes-on-ufc-to-join-world-victory-road/ Olympic gold medalist Satoshi Ishii passes on UFC to join World Victory Road]. MMA Mania. Retrieved on 2010-09-28.</ref> On September 14, 2009, it was announced that Ishii would make his MMA debut against fellow Olympian [[judo]] gold medalist [[Hidehiko Yoshida]].<ref>Nelson, Chris. (2009-09-14) [http://www.bloodyelbow.com/2009/9/14/1029468/satoshi-ishii-to-make-mma-debut Satoshi Ishii to Make MMA Debut Against Hidehiko Yoshida]. Bloody Elbow. Retrieved on 2010-09-28.</ref> Although the fight was originally to take place at [[World Victory Road]]'s New Year show on December 31, when that event was cancelled, the fight was moved to DREAM's ''[[Dynamite!! 2009]]'' card on New Year's Eve as a co-promoted show.<ref>[http://www.dreamofficial.com/ Dream Official Website]. Dreamofficial.com. Retrieved on 2010-09-28.</ref> Ishii, who was a large favorite in the fight, was dominated in the first round by the more-experienced Yoshida, taking many strikes including a right overhand that staggered the newcomer, along with a series of knees and [[uppercut]]s from the clinch. Ishii, however, came back with a more competitive second round, but took a point deduction after illegally kneeing Yoshida in the groin. Ishii continued to find his range in the third round with punches, but ultimately lost via unanimous decision.<ref>{{cite web |title=石井弱かった 吉田に惨敗／Dynamite!! |url=https://www.nikkansports.com/battle/news/p-bt-tp0-20100101-581570.html |website=nikkansports.com |access-date=29 October 2021}}</ref>

For his second fight, Ishii faced New Zealand heavyweight [[kickboxing]] champion Tafa "Thumper" Misipati on May 15, 2010, in [[Auckland]], New Zealand. The fight was the main event at the ETK production ''X-plosion: New Zealand vs. Japan''. Ishii won via [[Submission (combat sports)|submission]] ([[armbar]]) in the first round.<ref>{{cite web |title=石井愛妻に捧げるＶ／Ｘ－ＰＬＯＳＩＯＮ |url=https://www.nikkansports.com/battle/news/p-bt-tp0-20100516-630203.html |website=nikkansports.com |access-date=29 October 2021}}</ref>

In June 2010, Ishii caused controversy during an MMA exhibition match on the undercard of ''X-1 World Events: Nations Collide'' in Hawaii.  After knocking down his opponent Myles Tynanes at the end of the first-round, Ishii failed to stop punching his downed foe despite the referee's attempts to halt the action. He was subsequently disqualified for his actions.<ref>{{cite web|url=http://www.sherdog.com/news/news/Ishii-Disqualified-in-X-1-Exhibition-Clay-Submits-Wolff-24877 |title=Ishii Disqualified in X-1 Exhibition; Clay Submits Wolff |date=June 5, 2010 |work=Sherdog.com |first=James |last=Meinhardt |access-date=June 5, 2010}}</ref>

On September 25, 2010, Ishii fought [[Ikuhisa Minowa]], a [[Shoot wrestling|shoot wrestler]] known for facing much larger opponents, at [[Dream.16]] and won via unanimous decision.<ref name="Minowa">{{cite news|url=http://dreamofficial.com/free/news/detail.php?id=1285132846|title= 仰天カード実現!! 9・25『DREAM.16』日本ガイシホール大会追加対戦カード発表!!|publisher=dreamofficial.com|date=2010-09-22}}</ref><ref>[http://www.mmafighting.com/2010/09/22/ikuhisa-minowa-to-face-satoshi-ishii-at-dream-16/ Ikuhisa Minowa to Face Satoshi Ishii at DREAM.16]. MMA Fighting (2010-09-22). Retrieved on 2010-09-28.</ref>

Ishii's next MMA fight was supposed to be against [[Antz Nansen]] at the ''[[K-1 World MAX 2010 World Championship Tournament Final|K-1 World MAX 2010]]''.<ref>{{cite web|url=http://mmajunkie.com/news/21172/satoshi-ishii-vs-antz-nansen-mma-bout-added-to-nov-8-k-1-world-max-2010-event.mma |title=Satoshi Ishii vs. Antz Nansen MMA bout added to Nov. 8 K-1 World MAX 2010 event |date=October 27, 2010 |work=mmajunkie.com |access-date=October 27, 2010}}</ref> However, his opponent was changed to [[Katsuyori Shibata]] at the last minute. Ishii won via Kimura in the first round.<ref>{{cite web |title=【K-1MAX】佐藤嘉洋、無念…決勝戦で力尽きる！ペトロシアン史上初の2連覇を達成 |url=https://gbring.com/sokuho/result/result2010_11/1108_k-1max.htm |website=gbring.com |access-date=29 October 2021}}</ref>

Ishii continued to train at [[Black House (MMA)|Black House]] in Brazil with notable fighters such as [[Lyoto Machida]] and [[Anderson Silva]]. Prior to Silva's fight with [[Chael Sonnen]] Ishii hurt Silva's ribs. Since then he has trained at [[Mark Muñoz]]'s gym Reign MMA, along with [[Jason Miller (fighter)|Mayhem Miller]], [[Fabrício Werdum]] and other notable fighters.

Ishii then fought French kickboxing star [[Jérôme Le Banner]] in a mixed martial arts bout at the ''[[Dynamite!! 2010]]'' New Year's Eve event.<ref>{{cite web|url=http://mmaweekly.com/dream-adds-three-dynamite-2010-bouts-no-opponent-for-alistair-overeem-yet-mma-rumor|title=Dream Adds Three Dynamite!! 2010 Bouts, No Opponent For Alistair Overeem Yet|publisher=MMAWeekly.com|date=December 22, 2010}}</ref> He won the fight via unanimous decision.<ref>{{cite web |title=【Dynamite!!】 高谷が王座奪取！長島☆自演乙が青木をKO！石井はバンナに辛勝 |url=https://gbring.com/sokuho/result/result2010_12/1231_dynamite_03.htm |website=gbring.com |access-date=29 October 2021}}</ref>

Ishii was scheduled to make his North America debut for [[Strikeforce (mixed martial arts)|Strikeforce]] at ''Strikeforce Challengers 15'' against [[Scott Lighty]], but a visa issue stemming from the recent earthquake and tsunami left him unable to leave Japan. [[Lorenz Larkin]] took his place in the fight.<ref>{{cite web|url=http://www.heavy.com/mma/mma-news/2011/03/larkin-replaces-ishii-at-strikeforce-challengers-15/|title=Larkin replaces Ishii at Strikeforce Challengers 15|publisher=heavymma.com|date=March 28, 2011}}</ref>

In April 2011, it was reported that Ishii would retire from MMA and return to judo. Surprisingly, he said that he plans to earn American citizenship and represent the US at the [[2016 Summer Olympics]].<ref>{{cite web|url=http://prommanow.com/index.php/2011/04/20/olympic-champion-satoshi-ishii-done-fighting-mma|title=Olympic Champion Satoshi Ishii done fighting MMA|author=Richard Anderson Mann|publisher=Pro MMA Now}}</ref> However, he apparently decided against retiring from [[mixed martial arts|MMA]] as he went on to face former [[List of WEC champions#Middleweight Championship|WEC Middleweight Champion]] [[Paulo Filho]] at ''Amazon Forest Combat 1'' on September 14, 2011, in his [[Light heavyweight (MMA)|light heavyweight]] debut. The fight ended in a controversial draw, with journalists as well as the crowd agreeing that Ishii had won all three rounds.<ref>[http://www.sherdog.com/news/news/Ueda-Retires-Gracie-Ishii-Robbed-Against-Filho-at-Amazon-FC-35618 Ueda Retires Gracie, Ishii Robbed Against Filho at Amazon FC]. Sherdog.com. Retrieved on 2011-11-26.</ref>

Satoshi Ishii next competed at Fight For Japan: Genki Desu Ka Omisoko 2011, where he met MMA legend [[Fedor Emelianenko]].<ref>{{cite web|last=Santosus|first=Joey|title=Fedor Emelianenko vs. Satoshi Ishii likely for New Year's Eve|url=http://lowkick.blitzcorner.com/Dream/Fedor-Emelianenko-vs-Satoshi-Ishii-likely-for-New-Years-Eve-14451|access-date=7 December 2011}}</ref>  He lost the fight via KO in the first round.<ref>{{cite web |title=ヒョードル３連打石井ＫＯ／元気ですか!! |url=https://www.nikkansports.com/battle/news/f-bt-tp0-20120101-883713.html |website=nikkansports.com |access-date=29 October 2021}}</ref>

===Japanese circuit===
====Inoki Genome Federation====
After taking a year off from fighting to train following the Emelianenko loss, Ishii signed an exclusive multi fight deal with IGF in Japan. Here he has secured 6 victories in less than a year against former [[UFC Heavyweight Championship|UFC Heavyweight Champion]] [[Tim Sylvia]],<ref>{{cite web |title=石井慧－井上康生の柔道対決／メモ |url=https://www.nikkansports.com/battle/news/p-bt-tp0-20121231-1066388.html |website=nikkansports.com |access-date=29 October 2021}}</ref> UFC veterans [[Sean McCorkle]],<ref>{{cite web |title=【IGF】石井慧、アームロックで一本勝ち！元UFC戦士に二連勝 |url=https://efight.jp/result-20130223_12205 |website=efight.jp |date=23 February 2013 |access-date=29 October 2021}}</ref> [[Kerry Schall]], [[Pedro Rizzo]] and against [[Jeff Monson]].<ref>{{cite web |title=【IGF】石井慧、強豪ヒーゾを倒し4連勝 |url=https://efight.jp/result-20130526_17363 |website=efight.jp |date=26 May 2013 |access-date=29 October 2021}}</ref><ref>{{cite web |title=【M-1グローバル】石井慧がロシアで元寝技世界一に勝利 |url=https://efight.jp/result-20131020_23194 |website=efight.jp |date=20 October 2013 |access-date=29 October 2021}}</ref>

Ishii then faced [[Kazuyuki Fujita]] on December 31, 2013, for the [[Inoki Genome Federation#IGF Championship|IGF Championship]]. He won via unanimous decision, became the first IGF Champion.<ref>{{cite web|url=http://www.sherdog.com/events/IGF-Inoki-BomBaYe-2013-33915|title=IGF - Inoki Bom-Ba-Ye 2013|publisher=sherdog.com}}</ref>

Ishii defeated former [[Ultimate Fighting Championship|UFC]] fighter [[Phil De Fries]] in a non-title bout via unanimous decision at IGF 1 on April 5, 2014, in a full pride rules match as the headline bout on the card.<ref>{{cite web|url=http://www.pwinsiderxtra.com/ViewArticle.php?id=27162&p=1|title=UFC Veteran Headlining Inoki Genome Fight I|publisher=pwinsiderxtra.com|date=February 8, 2014}}</ref>

On August 23 at IGF 2, Despite being a heavy favorite due to his years and judo experience Ishii was defeated by [[Ultimate Fighting Championship|UFC]], [[Pride Fighting Championships|Pride]] and [[K-1]] veteran [[Mirko Cro Cop]] via doctor stoppage, losing the IGF Championship in the process.<ref>{{cite web|url=http://www.mmaweekly.com/mirko-cro-cop-to-fight-satoshi-ishii-in-mma-bout-at-igf-in-japan|title=Mirko Cro Cop to Fight Satoshi Ishii in MMA Bout at IGF in Japan|publisher=mmaweekly.com|date=2014-07-17}}</ref><ref>{{cite web|url=http://www.tokyo-sports.co.jp/prores/mens_prores/304651/|script-title=ja:【ＩＧＦ両国大会】石井流血で王座陥落 ミルコに額割られドクターストップ|date=2014-08-23|access-date=2014-08-23|work=[[Tokyo Sports]]|language=ja}}</ref>

Ishii was expected to face [[Pride Fighting Championships|PRIDE]] and [[Strikeforce (mixed martial arts)|Strikeforce]] veteran [[Sergei Kharitonov]] at M-1 Challenge 53: Battle in the Celestial Empire on November 11, 2014.<ref>{{cite web|url=http://www.sherdog.com/news/news/Sergei-Kharitonov-to-Face-Satoshi-Ishii-at-M1-Challenge-53-in-Beijing-on-Nov-11-73695|title=Sergei Kharitonov to face Satoshi Ishii at M-1 Challenge 53 in Beijing on Nov. 11|publisher=sherdog.com|author=Tristen Critchfield|date=September 12, 2014|access-date=October 5, 2014}}</ref> However, Ishii withdrew from the fight due to injury.<ref>{{cite web|url=http://www.tapology.com/fightcenter/bouts/150823-m-1-challenge-sergei-the-paratrooper-kharitonov-vs-satoshi-ishii|title=Sergei Kharitonov vs. Satoshi Ishii|publisher=Tapology.com}}</ref>

Ishii faced [[Mirko Cro Cop]] in a rematch at December 31, 2014, for the IGF Championship.<ref>{{Cite web|url=http://fansided.com/2014/09/13/satoshi-ishii-given-immediate-rematch-mirko-cro-cop/|title = Satoshi Ishii given immediate rematch against Mirko Cro Cop|date = 13 September 2014}}</ref> Early reports had the rematch cancelled due to a rib injury sustained by Ishii.<ref>{{cite web|url=http://www.sherdog.com/news/news/Mirko-Cro-Cop-to-Compete-on-New-Years-Eve-in-Japan-at-Inoki-BomBaYe-2014-76649|title=Mirko 'Cro Cop' to compete on new year's eve in Japan at 'Inoki Bom-Ba-Ye 2014 |publisher=sherdog.com |date=2014-11-04}}</ref> However, in December 2014, it was reported that Ishii would be able to heal up in time to fight Cro Cop, and the rematch was official once again.<ref>{{cite web|url=http://www.mmaweekly.com/satoshi-ishii-vs-cro-cop-rematch-at-igfs-new-years-eve-show-plus-josh-barnett|title=Satoshi Ishii vs Cro Cop rematch at IGF's New Years Eve show|publisher=mmaweekly.com|date=2014-12-01}}</ref> Ishii lost the fight via TKO at the end of the second round.<ref>{{cite web |title=Cro Cop brutalno nokautirao Ishiija u drugoj rundi! |url=https://www.tportal.hr/sport/clanak/cro-cop-brutalno-nokautirao-ishiija-u-drugoj-rundi-20141231 |website=tportal.hr |access-date=29 October 2021}}</ref>

After suffering back-to-back losses to Cro Cop, Ishii was scheduled to face Nick Rossborough at Inoki Genome Fight 3 on April 11, 2015. He won by a first-round submission.<ref>{{cite web |title=IGF: Satoshi Ishii i Chris Barnett uvjerljivi, težak poraz Nizozemca Staringa - VIDEO |url=https://www.profightstore.hr/portal/slobodna%20borba/igf-satoshi-ishii-i-chris-barnett-uvjerljivi-tezak-poraz-nizozemca-staringa-video/19554 |website=profightstore.hr |access-date=29 October 2021}}</ref>

Ishii fought Will Penn in his final IGF appearance, at Inoki Genome Fight 4 on August 29, 2015.<ref>{{cite web |title=Chris Barnett i Satoshi Ishii nastupaju na sutrašnjem IGF eventu |url=https://www.profightstore.hr/portal/slobodna-borba/chris-barnett-i-satoshi-ishii-nastupaju-na-sutrasnjem-igf-eventu/20498 |website=profightstore.hr |date=28 August 2015 |access-date=29 October 2021}}</ref> He won the fight by a first-round submission.<ref>{{cite web |title=VIDEO! Satoshi Ishii slavio gušenjem na priredbi Inoki Genome Fight 4 |url=https://www.profightstore.hr/portal/slobodna%20borba/video-satoshi-ishii-slavio-gusenjem-na-priredbi-inoki-genome-fight-4/20509 |website=profightstore.hr |access-date=29 October 2021}}</ref>

====Rizin FF====
In his debut for the Rizin promotion, Ishii faced [[Jiří Procházka]] on December 29, 2015, at [[Rizin Fighting Federation]] World (8-men) Tournament.<ref>{{Cite web|title = Rizin FF - Rizin Fighting Federation 2|url = http://www.sherdog.com/events/Rizin-FF-Rizin-Fighting-Federation-2-48359|website = Sherdog|access-date = 2015-11-25}}</ref> He lost the fight via knockout early in the first round. However there was some speculation about a possible fight fix, as a head kick thrown by Procházka appeared to be blocked by Ishii, but Ishii collapsed anyway and was finished off shortly after.<ref>{{cite web |title=石井 ９６秒で失神…"日本代表"が屈辱ＫＯ負け |url=https://www.sponichi.co.jp/battle/news/2015/12/30/kiji/K20151230011778480.html |website=sponichi.co.jp |access-date=29 October 2021}}</ref>

Ishii made his North American MMA debut against [[Quinton Jackson]] on June 24, 2016, at [[Bellator MMA in 2016#Bellator 157|Bellator 157]].<ref>{{cite web|url=http://mmajunkie.com/2016/04/bellator-157-dynamite-2-heads-to-st-louis-in-june-with-rampage-vs-satoshi-ishii|title=Bellator 157: Dynamite 2 heads to St. Louis in June with 'Rampage' vs. Satoshi Ishii|publisher=mmajunkie.com|author=Staff|date=2016-04-05|access-date=2016-04-05}}</ref> He lost the fight via split decision. One judge scored the fight 29–28 to Ishii, while the other two judges scored it 29–28 and 30–27 for Jackson.<ref>{{cite web |title=【ベラトール】石井慧、ジャクソンに僅差で敗れ二連敗に |url=https://efight.jp/result-20160624_240556 |website=efight.jp |date=24 June 2016 |access-date=29 October 2021}}</ref>

Ishii was scheduled to face [[Muhammed Lawal]] at [[Bellator MMA in 2016|Bellator 169]] on December 16, 2016. He lost the fight by unanimous decision.<ref>{{cite web |last1=Brookhouse |first1=Brent |title=Bellator 169 results: 'King Mo' Lawal dominates Satoshi Ishii for decision win |url=https://mmajunkie.usatoday.com/2016/12/bellator-169-results-king-mo-lawal-dominates-satoshi-ishii-for-decision-win |website=mmajunkie.usatoday.com |date=17 December 2016 |access-date=29 October 2021}}</ref>

Following his third consecutive loss, Ishii was scheduled to face the long-time mixed martial arts veteran [[Heath Herring]] at [[2017 in Rizin Fighting Federation#Rizin 2017 in Yokohama: Sakura|Rizin 2017 in Yokohama: Sakura]] on April 16, 2017. He snapped his losing streak with a unanimous decision victory.<ref>{{cite web |title=(VIDEO) RIZIN: Satoshi Ishii vs. Heath Herring |url=http://fight.hr/news/video-rizin-satoshi-ishii-vs-heath-herring/18881.aspx |website=fight.hr |access-date=29 October 2021}}</ref>

===European circuit===
Ishii was scheduled to face Ivan Shtyrkov at RCC Boxing Promotions: Russia vs Japan on July 9, 2017. He lost the fight by a first-round technical knockout, as Shtyrkov floored the Olympian with a right straight.<ref>{{cite web |title=Muscled Ivan Shtyrkov stiffens Satoshi Ishii with a right straight. |url=https://www.mikeswick.com/muscled-shtyrkov-stiffens-ishii/ |website=mikeswick.com |date=10 July 2017 |access-date=29 October 2021}}</ref>

Ishii made his first and only Final Fight Championship appearance against Björn Schmiedeberg at Final Fight Championship 30 on October 21, 2017.<ref>{{cite web |title=Satoshi Ishii veliko pojačanje FFC-a: U ringu već sljedeće subote! |url=https://gol.dnevnik.hr/clanak/rubrika/mma/satoshi-ishii-veliko-pojacanje-ffc-a-u-ringu-vec-sljedece-subote---492470.html |website=gol.dnevnik.hr |access-date=29 October 2021}}</ref> He won the fight by a first-round submission.<ref>{{cite web |title=Satoshi Ishii s lakoćom odnio pobjedu u FFC debiju |url=http://www.mmanovost.com/satoshi-ishii-s-lakocom-odnio-pobjedu-u-ffc-debiju/ |website=mmanovost.com |date=21 October 2017 |access-date=29 October 2021}}</ref>

Ishii was scheduled to face Rokas Stambrauskas at German MMMA Championship 17 on October 13, 2018. He won the fight by a first-round submission.<ref>{{cite web |title=Satoshi Ishii savladao Stambrauskasa gušenjem u prvoj rundi |url=https://arhiva.fightsite.hr/rubrike/vijesti-iz-regije/satoshi-ishii-savladao-stambrauskasa-polugom-u-prvoj-rundi/ |website=arhiva.fightsite.hr |access-date=29 October 2021}}</ref>

====SBC Heavyweight champion====
Ishii fought for the Serbian Battle Championship heavyweight title in his debut for the organization, against Tony Lopez at SBC 19 on December 1, 2018.<ref>{{cite web |title=SBC priprema spektakl! Potvrđen napad Satoshija Ishiija na teškaški pojas vojvođanske promocije |url=https://arhiva.fightsite.hr/rubrike/vijesti-iz-regije/sbc-priprema-spektakl-potvrden-napad-satoshia-ishiaa-na-teskaski-pojas-vojvodanske-promocije/ |website=arhiva.fightsite.hr |access-date=29 October 2021}}</ref> He won the fight by a first-round submission.

Ishii made his first SBC heavyweight title defense against Rodrigo Carlos at Serbian Battle Championship 20 on February 16, 2019.<ref>{{cite web |title=Satoshi Ishii dobio protivnika u glavnoj SBC 20 borbi |url=https://arhiva.fightsite.hr/rubrike/vijesti-iz-regije/satoshi-ishii-dobio-protivnika-u-glavnoj-sbc-20-borbi/ |website=arhiva.fightsite.hr |access-date=29 October 2021}}</ref> He won the fight by a first-round technical knockout.<ref>{{cite web |last1=Howard |first1=DC |title=Serbian Battle Championship 20: Satoshi Ishii cruises to a quick TKO |url=https://thebodylockmma.com/mma/serbian-battle-championship-20-satoshi-ishii-cruises-to-a-quick-tko/ |website=thebodylockmma.com |date=17 February 2019 |access-date=29 October 2021}}</ref>

Ishii challenged Cally Gibrainn de Oliveira for the HEAT Heavyweight Championship at HEAT 44 on March 2, 2019. He claimed the title via second-round submission.<ref name=asianmma44>{{cite web|url=https://asianmma.com/satoshi-ishii-to-face-cleber-souza-in-heavyweight-title-fight-at-heat-46/|title= Satoshi Ishii faces Cleber Souza in heavyweight title fight at Heat 46|date=December 16, 2019|website=asianmma.com}}</ref>

Ishii was scheduled to face the former KSW champion Fernando Rodrigues at [[2019 in Konfrontacja Sztuk Walki#KSW 47: The X-Warriors|KSW 47: The X-Warriors]] on March 23, 2019.<ref>{{cite web |last1=Carroll |first1=Peter |title=Satoshi Ishii meets former champion Fernando Rodrigues Jr. at KSW 47 |url=https://www.mmafighting.com/2019/2/20/18233224/satoshi-ishii-meets-former-champion-fernando-rodrigues-jr-at-ksw-47 |website=mmafighting.com |date=20 February 2019 |access-date=29 October 2021}}</ref> He won the fight by split decision.<ref>{{cite web |last1=Martin |first1=Damon |title=Satoshi Ishii edges out Fernando Rodrigues Jr. at KSW 47 |url=https://asianmma.com/satoshi-ishii-edges-out-fernando-rodrigues-jr-at-ksw-47/ |website=asianmma.com |date=24 March 2019 |access-date=29 October 2021}}</ref>

===Professional Fighters League===
On January 1, 2019, Ishii revealed that he had signed a contract with [[Professional Fighters League]], and he took part in the second heavyweight regular season.<ref name=pflsign />

Ishii faced Zeke Tuinei Wily at [[PFL 3 (2019 season)|PFL 3]] on June 6, 2019, in his promotional debut. He won the fight by split decision.<ref>{{cite web |last1=Doherty |first1=Dan |title=PFL 3 2019 Results: Satoshi Ishii Gets By Tough Zeke Tuinei-Wily |url=https://cagesidepress.com/2019/06/06/pfl-3-2019-results-satoshi-ishii/ |website=cagesidepress.com |date=6 June 2019 |access-date=29 October 2021}}</ref>

Ishii faced [[Jared Rosholt]] at [[PFL 6 (2019 season)|PFL 6]] on August 8, 2019.<ref>{{cite web |last1=Shelton |first1=Cole |title=Satoshi Ishii Focused on Upcoming Bout vs. Jared Rosholt, Not PFL Standings |url=https://www.sherdog.com/news/news/Satoshi-Ishii-Focused-on-Upcoming-Bout-vs-Jared-Rosholt-Not-PFL-Standings-159647 |website=sherdog.com |access-date=29 October 2021}}</ref> He lost the fight by unanimous decision.<ref>{{cite web |title=Jared Rosholt Edges Satoshi Ishii to Earn Spot in PFL Heavyweight Playoffs |url=https://www.sherdog.com/news/news/Jared-Rosholt-Edges-Satoshi-Ishii-to-Earn-Spot-in-PFL-Heavyweight-Playoffs-159859 |website=sherdog.com |access-date=29 October 2021}}</ref>

Ishii faced [[Denis Goltsov]] in the 2019 heavyweight quarterfinal bout at [[PFL 9 (2019 season)|PFL 9]] on October 31, 2019. He lost the fight by majority decision.<ref>{{cite web |last1=Anderson |first1=Jay |title=PFL 9 2019 Results: Denis Goltsov Gets Past Satoshi Ishii Via Decision |url=https://cagesidepress.com/2019/10/31/pfl-9-2019-results-denis-goltsov-vs-satoshi-ishii/ |website=cagesidepress.com |date=31 October 2019 |access-date=29 October 2021}}</ref>

===Second run on European circuit===
Ishii faced Jake Heun at [[2019 in Rizin Fighting Federation#Rizin 20 - Saitama|Rizin 20]] on December 31, 2019.<ref>{{cite web|url=https://www.mmafighting.com/2019/12/4/20995000/kai-asakura-manel-kape-vacant-rizin-bantamweight-title-mma-bellator|title=Eight fights added to Bellator Japan and RIZIN 20, including Kai Asakura vs. Manel Kape for vacant RIZIN bantamweight title|author=Guilherme Cruz|publisher=mmafighting.com|date=December 4, 2019}}</ref> He lost the fight via first-round knockout.

As his first HEAT title defense, Ishii faced Cleber Souza at HEAT 46 on January 19, 2020. He retained the title via first-round submission.<ref>{{cite web |title=Ishii prekidom obranio titulu, Milinković zaustavio japansku legendu! |url=https://fightsite.hr/regija/ishii-prekidom-obranio-titulu-milinkovic-zaustavio-japansku-legendu/9869911/ |website=fightsite.hr |date=19 January 2020 |access-date=17 September 2020}}</ref>

Ishii next faced Stuart Austin for the inaugural EMC Heavyweight Championship at EMC 5 on September 5, 2020.<ref>{{cite web|url=https://mmajunkie.usatoday.com/2020/08/japanese-judoka-satoshi-ishii-fights-for-elite-mma-championship-in-germany|title=Japanese judoka Satoshi Ishii fights for Elite MMA Championship in Germany|author=John Morgan|publisher=mmajunkie.com|date=August 23, 2020}}</ref> Ishii lost a controversial unanimous decision, to which his team decided to appeal.<ref>{{cite web |title=Ishii se oglasio nakon sporne odluke: 'Žalimo se komisiji' |url=https://fightsite.hr/regija/ishii-se-oglasio-nakon-sporne-odluke-zalimo-se-komisiji/10470436/ |website=fightsite.hr |date=7 September 2020 |access-date=17 September 2020}}</ref>

Ishii faced Pietro Cappelli at EMC 7 on July 3, 2021. He won the fight by a first-round submission.<ref>{{cite web |title=Rezultati EMC 7 priredbe: Svi hrvatski borci slavili, Ishii uspavao protivnika |url=https://fightsite.hr/fightsite/regija/rezultati-emc-7-priredbe-svi-hrvatski-borci-slavili-ishii-uspavao-protivnika-15085469 |website=fightsite.hr |date=4 July 2021 |access-date=4 July 2021}}</ref>

Ishii was scheduled to face [[Daniel Spohn]] at HEAT 50 on May 7, 2022.<ref>{{cite web |title=【HEAT】K-1でKO勝ちも準決勝を負傷棄権の石井慧が、MMAで復帰戦「今は無理するとき」＝5月7日（土）『HEAT 50』でスポーンと対戦 |url=https://gonkaku.jp/articles/10129 |website=gonkaku.jp |access-date=12 April 2022}}</ref> However, the bout was scrapped after Spohn tested positive for coronavirus.<ref>{{Cite web |date=2022-05-08 |title=Fight Site - Satoshi Ishii ostao bez nastupa ovaj vikend, ali zato će nastupiti na FNC-ovom eventu u Karlovcu! |url=https://fightsite.hr/fightsite/regija/satoshi-ishii-ostao-bez-nastupa-ovaj-vikend-ali-zato-ce-nastupiti-na-fnc-ovom-eventu-u-karlovcu-15194662 |access-date=2022-05-10 |website=fightsite.hr |language=hr-hr}}</ref> Ishii was instead booked to face Charlie Milner at FNC 6 on June 17, 2022.<ref>{{cite web |title=Satoshi Ishii se na FNC-ovoj priredbi u Karlovcu bori protiv Kung Fu Pande |url=https://www.croring.com/mma/satoshi-ishii-se-na-fnc-ovoj-priredbi-u-karlovcu-bori-protiv-kung-fu-pande/ |website=croring.com |access-date=8 July 2022}}</ref> He won the fight by a first-round knockout.<ref>{{cite web |title=Satoshi Ishii uspavao Milnera za samo 40 sekundi: Nakon brzog rušenja lako došao do finiša |url=https://fightsite.hr/fightsite/regija/satoshi-ishii-uspavao-milnera-za-samo-40-sekundi-nakon-brzog-rusenja-lako-dosao-do-finisa-15211955 |website=fightsite.hr |date=17 June 2022 |access-date=8 July 2022}}</ref>

===Return to Professional Fighter's League===
On June 6, 2023, Ishii announced that he had signed a new contract with [[Professional Fighters League|PFL]] in order to make his return to the promotion.<ref>{{cite web |last1=Rogers |first1=Kian |title=Satoshi Ishii Signs MMA Deal With PFL |url=https://jitsmagazine.com/satoshi-ishii-signs-mma-deal-with-pfl/ |website=JitsMagazine |date=7 June 2023 |access-date=7 June 2023}}</ref> He competed against [[Danilo Marques]] at PFL 8 on August 18, 2023.<ref>{{cite web |last1=Jones |first1=Phil |title=Satoshi Ishii Returns Against Danilo Marques At PFL 8 |url=https://jitsmagazine.com/satoshi-ishii-returns-against-danilo-marques-at-pfl-8/ |website=Jitsmagazine |date=22 July 2023 |access-date=22 July 2023}}</ref> He lost the fight by unanimous decision.<ref>{{cite web |title=Satoshi Ishii Drops Decision In PFL 8 Results |url=https://jitsmagazine.com/satoshi-ishii-drops-decision-in-pfl-8-results/ |website=Jitsmagazine |date=19 August 2023 |access-date=19 August 2023}}</ref>

On March 3, 2024, Ishii announced his retirement from MMA competition.<ref>{{Cite web |title=北京五輪金メダル・石井慧が引退　約14年のプロ格闘家生活で体が悲鳴「ここが潮時かな」と決断 
|url=https://www.tokyo-sports.co.jp/articles/-/294193 |access-date=2024-09-08 |website=Tokyo Sports |language=ja}}</ref><ref>{{Cite web |date=2024-09-07 |title=2024 MMA retirement tracker: A list of those who hung up the gloves 
|url=https://mmajunkie.usatoday.com/lists/2024-ufc-bellator-mma-retirement-tracker-champions-women-legends-contenders |access-date=2024-09-08 |website=MMA Junkie |language=en-US}}</ref>

==Kickboxing career==
On August 3, 2021, it was announced that Ishii had signed with [[K-1]].<ref>{{cite web |title=【K-1】石井慧が電撃参戦！ K-1ルールで愛鷹亮と激突「絶対に勝ちます」（石井）×「柔道の世界では雲の上の存在だけど、K-1ファイターとしては自分が先輩」（愛鷹）＝9.20 横浜 |url=https://gonkaku.jp/articles/7724 |website=gonkaku.jp |access-date=4 August 2021}}</ref> He was scheduled to make his kickboxing debut against the one-time cruiserweight title challenger [[Ryo Aitaka]] at [[2021 in K-1#K-1 World GP 2021: Yokohamatsuri|K-1 World GP 2021: Yokohamatsuri]] on September 20, 2021.<ref>{{cite web |title=【K-1】初参戦の石井慧を迎え撃つ愛鷹亮「自分の拳がぶっ壊れるくらいの勢いでぶん殴っていかないと倒せない」 |url=https://gonkaku.jp/articles/7725 |website=gonkaku.jp/ |access-date=4 August 2021}}</ref> Ishii won the fight by unanimous decision, after an extra round was fought.<ref>{{cite web |title=Satoshi Ishii pobijedio u kickboxing debiju na priredbi japanske K-1 organizacije |url=https://fightsite.hr/fightsite/regija/satoshi-ishii-pobijedio-u-kickboxing-debiju-na-priredbi-japanske-k-1-organizacije-15103743 |website=fightsite.hr |date=20 September 2021 |access-date=20 September 2021}}</ref>

Ishii was scheduled to make his second professional kickboxing appearance against RUI at [[2021 in K-1#K-1 World GP 2021 in Osaka|K-1 World GP 2021 in Osaka]] on December 4, 2021.<ref>{{cite web |title=【Ｋ―１】石井慧がＫ―１に再出撃！ 「前回の試合よりも２０％成長した姿を見せられれば」 |url=https://news.yahoo.co.jp/articles/60c2f6c5b920562305f713df498cede201150587 |website=news.yahoo.co.jp |access-date=28 October 2021}}</ref> Ishii won the fight by unanimous decision.<ref>{{cite web |title=Satoshi Ishii ponovno slavio u kickboxing meču! Uvjerljivo je savladao iskusnog protivnika |url=https://fightsite.hr/fightsite/regija/satoshi-ishii-ponovno-slavio-u-kickboxing-mecu-uvjerljivo-je-savladao-iskusnog-protivnika-15128741 |website=fightsite.hr |date=4 December 2021 |access-date=13 December 2021}}</ref>

Ishii took part in the 2022 K-1 openweight tournament, held at [[2022 in K-1#K-1: K'Festa 5|K-1: K'Festa 5]] on April 3, 2022. He faced BigBang heavyweight champion Kosuke Jitsukata in the tournament quarterfinals.<ref>{{cite web |title=【K-1】石井慧、京太郎、サッタリら出場の無差別級トーナメント初開催＝K-1生誕の地・代々木で |url=https://gonkaku.jp/articles/9504 |website=gonkaku.jp |access-date=9 February 2022}}</ref> He won the fight by a  second-round knockout.<ref>{{cite web |title=【Ｋ１】石井慧肋骨骨折疑いでドクターストップ 無差別級トーナメント準決勝棄権 代役加藤久輝 |url=https://www.nikkansports.com/battle/news/202204030000880.html |website=nikkansports.com |access-date=3 April 2022}}</ref> Ishii withdrew from the tournament after this bout, due to a rib injury.<ref>{{cite web |title=【K-1】石井慧がKOで1回戦突破も、脇腹をおさえて苦痛の表情 |url=https://news.yahoo.co.jp/articles/bd8e2c2847ccf177504d95277665dc829ece73de |website=news.yahoo.co.jp |access-date=3 April 2022}}</ref>

Ishii faced the former [[K-1#K-1 Heavyweight Title Champions|K-1 Heavyweight Champion]] in a super heavyweight bout at [[2023 in K-1#K-1 World GP 2023: K'Festa 6|K-1 World GP 2023: K'Festa 6]] on March 12, 2023.<ref>{{cite web |title=石井慧ｖｓ京太郎が決定 ３・１２ Ｋ-１の祭典で 石井は「区切りの試合」 |url=https://news.yahoo.co.jp/articles/80c651323253c5b466456df138468f079b71cd5f |website=news.yahoo.co.jp |access-date=13 January 2023}}</ref> He lost the fight by unanimous decision, with scores of 30–29, 30–29 and 30–27.<ref>{{cite web |title=【K―1】石井慧は京太郎に判定負け 青木真也は「塩」 |url=https://news.yahoo.co.jp/articles/abc6f17fe37f3036256692a11ce81ffbe2090ff0 |website=news.yahoo.co.jp |access-date=12 March 2023}}</ref>

==Professional boxing career==
Ishi made his professional boxing debut against Shuho Takayama (1–0) on August 14, 2022, as part of the "3150 Fight Vol 3" event.<ref>{{cite web |title=Satoshi Ishii sredinom kolovoza debitira u profesionalnom boksu |url=https://www.croring.com/boks/satoshi-ishii-sredinom-kolovoza-debitira-u-profesionalnom-boksu/ |website=croring.com |access-date=5 August 2022}}</ref> He won the fight by majority decision.<ref>{{cite web |title=Satoshi Ishii pobjeđuje u kojem god sportu se okuša: Danas je upisao prvu pobjedu u profesionalnom boksu |url=https://fightsite.hr/fightsite/regija/satoshi-ishii-pobjeduje-u-kojem-god-sportu-se-okusa-danas-je-upisao-prvu-pobjedu-u-profesionalnom-boksu-15235031 |website=fightsite.hr |date=14 August 2022 |access-date=14 August 2022}}</ref>

Ishii faced Chang Soo Han on January 6, 2023, as part of the "3150 Fight Vol 6" event. The fight was ruled a majority decision draw.<ref>{{cite web |title=Satoshi Ishii u svom drugom nastupu u profesionalnom boksu odradio neriješen meč |url=https://fightsite.hr/fightsite/regija/satoshi-ishii-u-svom-drugom-nastupu-u-profesionalnom-boksu-odradio-nerijesen-mec-15292968 |website=fightsite.hr |date=6 January 2023 |access-date=6 January 2023}}</ref> Ishii announced his retirement from the sport of boxing during the post-fight press conference.<ref>{{cite web |title=石井慧がボクシング引退を表明「もうこれで最後にします」次の舞台は果たして |url=https://efight.jp/news-20230106_1338045 |website=efight.jp |date=6 January 2023 |access-date=6 January 2023}}</ref>

==Submission grappling career==

Ishii challenged [[Mason Fowler]] for the Submission Underground absolute championship at Submission Underground 19 on December 20, 2020.<ref>{{cite web |last1=Rollo |first1=Ian |title=Submission Underground 19 Lineup Full Of MMA Stars |url=https://jitsmagazine.com/submission-underground-19-lineup-full-of-mma-stars/ |website=JitsMagazine |date=9 November 2020 |access-date=7 June 2023}}</ref> He lost the match by submission in EBI overtime.<ref>{{cite web |title=Submission Underground 19 Full Results And Review |url=https://jitsmagazine.com/submission-underground-19-full-results-and-review/ |website=JitsMagazine |date=21 December 2020 |access-date=7 June 2023}}</ref>

Ishii returned at Submission Underground 20 on December 30, 2020, to face [[Craig Jones (grappler)|Craig Jones]] in the co-main event.<ref>{{cite web |last1=Rogers |first1=Kian |title=Mason Fowler Takes On Ryan Bader At Submission Underground 20 |url=https://jitsmagazine.com/mason-fowler-takes-on-ryan-bader-at-submission-underground-20/ |website=JitsMagazine |date=26 December 2020 |access-date=7 June 2023}}</ref> He was submitted with a rear-naked choke at 2:08 of regulation time.<ref>{{cite web |title=Submission Underground 20 Full Results And Review |url=https://jitsmagazine.com/submission-underground-20-full-results-and-review/ |website=JitsMagazine |date=January 2021 |access-date=7 June 2023}}</ref>

Ishii then competed against Andy Varela at Submission Underground 21 on March 28, 2021.<ref>{{cite web |last1=Jones |first1=Phil |title=Both Promotional Titles On The Line At Submission Underground 21 |url=https://jitsmagazine.com/both-promotional-titles-on-the-line-at-submission-underground-21/ |website=JitsMagazine |date=9 March 2021 |access-date=7 June 2023}}</ref> He lost the match in EBI overtime due to having the least ride-time.<ref>{{cite web |title=Submission Underground 21 Full Results And Review |url=https://jitsmagazine.com/submission-underground-21-full-results-and-review/ |website=JitsMagazine |date=30 March 2021 |access-date=7 June 2023}}</ref>

==Personal life==
Ishii was married for 9 months to Mika, a university student, divorcing in January 2011.<ref>{{in lang|ja}} [http://www.nikkansports.com/battle/news/p-bt-tp0-20110329-754207.html 石井慧離婚　女子大生とたったの９カ月]. March 29, 2011</ref> In 2013, he married singer [[Asuka Hayashi]].<ref>{{cite web |title=石井慧与歌手林明日香喜传婚讯 |url=https://www.517japan.com/viewnews-66631.html |website=517japan.com |access-date=29 October 2021}}</ref> They divorced in 2016. They have one son.<ref>{{cite web |title=石井慧２度目の離婚 林明日香と３年…「すれ違い」 |url=https://www.nikkansports.com/battle/news/1691343.html |website=nikkansports.com |access-date=29 October 2021}}</ref>

In 2019, Ishii obtained [[Croatian citizenship]] and passport and had to give up [[Japanese citizenship]] and passport due to Japan's policy against [[dual citizenship]].<ref>{{cite web |title=Satoshi Ishii wins first MMA fight as a Croatian citizen |url=https://www.croatiaweek.com/satoshi-ishii-wins-first-mma-fight-as-a-croatian-citizen/ |website=croatiaweek.com |date=24 March 2019 |access-date=30 March 2019}}</ref>

==Championships and accomplishments==
'''Professional mixed martial arts'''
*'''Serbian Battle Championship'''
**SBC Heavyweight Championship (One time; current)<ref>{{Cite web|url=https://www.tapology.com/fightcenter/bouts/393287-serbian-battle-championship-19-satoshi-ishii-vs-tony-kryptonite-lopez|title=Satoshi Ishii vs. Tony Lopez, Serbian Battle Championship 19 {{!}} MMA Bout Page {{!}} Tapology|website=Tapology|language=en|access-date=2018-12-03}}</ref>
*** One successful title defense
*'''[[Inoki Genome Federation]]'''
**[[Inoki Genome Federation#IGF Championship|IGF Championship]] ([[Inoki Genome Federation#Title history|1 time]])<ref>{{cite web|url=http://battle-news.com/fight/index.php?QBlog-20131231-1|title=【猪木祭り】MMAルールによる藤田vs石井のIGF王座戦|date=2013-12-31|access-date=2014-01-01|work=Battle News|language=ja}}</ref>
*'''HEAT'''
**HEAT Heavyweight Championship (One time; current)[https://asianmma.com/satoshi-ishii-claims-heat-heavyweight-title/]
***One successful title defense

==Mixed martial arts record==
{{MMArecordbox
| draws= 1
| nc= 
| ko-wins= 3
| ko-losses= 6
| sub-wins= 12
| sub-losses= 
| dec-wins= 10
| dec-losses= 7
| dq-wins= 
| dq-losses= 
| other-wins= 
| other-losses= 
}}
{{MMA record start}}
|-
|{{no2}}Loss
|align=center|25–13–1
|[[Danilo Marques]]
|Decision (unanimous)
|[[PFL 8 (2023)]]
|{{dts|2023|August|18}}
|align=center|3
|align=center|5:00
|[[New York City, New York]], United States
|
|-
|{{yes2}}Win
|align=center|25–12–1
|Charlie Milner
|TKO (punches)
|FNC 6
|{{dts|2022|June|17}}
|align=center|1 
|align=center|0:40
|[[Karlovac]], Croatia
|
|-
|{{yes2}}Win
|align=center|24–12–1
|Pietro Cappelli
|Submission (north-south choke)
|EMC 7
|{{dts|2021|July|3}}
|align=center| 1
|align=center| 2:41
|[[Ratingen]], Germany
|
|-
|{{no2}}Loss
|align=center|23–12–1
|Stuart Austin
|Decision (unanimous)
|EMC 5
|{{dts|2020|September|5}}
|align=center| 3
|align=center| 5:00
|[[Düsseldorf]], Germany
|{{small|For the vacant EMC Heavyweight Championship.}}
|-
|{{yes2}}Win
|align=center|23–11–1
|Cleber Souza
|Submission (armbar)
|HEAT 46
|{{dts|2020|January|19}}
|align=center| 1
|align=center| 3:24
|[[Tokyo]], Japan
|{{small|Defended the HEAT Heavyweight Championship.}}
|-
|{{no2}}Loss
|align=center|22–11–1
|Jake Heun
|KO (punches)
|[[2019 in Rizin Fighting Federation#Rizin 20 - Saitama|Rizin 20]]
|{{dts|2019|December|31}}
|align=center| 1
|align=center| 1:18
|[[Saitama (city)|Saitama]], Japan
|
|-
|{{no2}}Loss
|align=center|{{nowrap|22–10–1}}
|[[Denis Goltsov]]
|Decision (majority)
|[[PFL 9 (2019)]]
|{{dts|2019|October|31}}
|align=center| 2
|align=center| 5:00
|[[Las Vegas, Nevada]], United States
|{{small|[[2019 in Professional Fighters League#2019 PFL Heavyweight playoffs|2019 PFL Heavyweight Tournament]] Quarterfinal.}}
|-
|{{no2}}Loss
|align=center|22–9–1
|[[Jared Rosholt]]
|Decision (unanimous)
|[[PFL 6 (2019)]]
|{{dts|2019|August|8}}
|align=center| 3
|align=center| 5:00
|[[Atlantic City, New Jersey]], United States
|
|-
|{{yes2}}Win
|align=center|22–8–1
|Zeke Tuinei Wily
|Decision (split)
|[[PFL 3 (2019)]]
|{{dts|2019|June|6}}
|align=center| 3
|align=center| 5:00
|[[Uniondale, New York]], United States
|
|-
|{{yes2}}Win
|align=center|21–8–1
|Fernando Rodrigues Jr.
|Decision (split)
|[[2019 in Konfrontacja Sztuk Walki#KSW 47: The X-Warriors|KSW 47: The X-Warriors]]
|{{dts|2019|March|23}}
|align=center| 3
|align=center| 5:00
|[[Łódź]], Poland
|
|-
|{{yes2}}Win
|align=center|20–8–1
|Cally Gibrainn de Oliveira
|Submission (kimura)
|HEAT 44
|{{dts|2019|March|2}}
|align=center|2
|align=center|3:54
|[[Nagoya]], Japan
|{{small|Won the HEAT Heavyweight Championship.}}
|-
|-
|{{yes2}}Win
|align=center|19–8–1
|Rodrigo Carlos
|TKO (punches)
|Serbian Battle Championship 20
|{{dts|2019|February|16}}
|align=center|1
|align=center|1:42
|[[Sombor]], Serbia
|{{small|Defended the SBC Heavyweight Championship.}}
|-
|{{yes2}}Win
|align=center|18–8–1
|Tony Lopez
|Submission (kneebar)
|Serbian Battle Championship 19
|{{dts|2018|December|1}}
|align=center|1
|align=center|4:42
|[[Novi Sad]], Serbia
| {{small|Won the vacant SBC Heavyweight Championship.}}
|-
|{{yes2}}Win
|align=center|17–8–1
|Rokas Stambrauskas
|Submission (leg scissor choke)
|German MMMA Championship 17
|{{dts|2018|October|13}}
|align=center|1
|align=center|4:43
|[[Düsseldorf]], Germany
|
|-
|{{yes2}}Win
|align=center|16–8–1
|Björn Schmiedeberg
|Submission (kimura)
|Final Fight Championship 30
|{{dts|2017|October|21}}
|align=center|1
|align=center|2:36
|[[Linz]], Austria
|
|-
|{{no2}}Loss
|align=center|15–8–1
|Ivan Shtyrkov
|TKO (punches)
|RCC Boxing Promotions: Russia vs Japan
|{{dts|2017|July|9}}
|align=center|2
|align=center|3:43
|[[Yekaterinburg]], Russia
|
|-
|{{yes2}}Win
|align=center|15–7–1
|[[Heath Herring]]
|Decision (unanimous)
|[[2017 in Rizin Fighting Federation#Rizin 2017 in Yokohama: Sakura|Rizin 2017 in Yokohama: Sakura]]
|{{dts|2017|April|16}}
|align=center|2
|align=center|5:00
|[[Yokohama]], Japan
|
|-
| {{no2}}Loss
| align=center| 14–7–1
| [[Muhammed Lawal]]
| Decision (unanimous)
| [[Bellator MMA in 2016|Bellator 169]]
| {{dts|2016|December|16}}
| align=center| 3
| align=center| 5:00
| [[Dublin]], Ireland
| 
|-
| {{no2}}Loss
| align=center| 14–6–1
| [[Quinton Jackson]]
| Decision (split)
| [[Bellator 157|Bellator 157: Dynamite 2]]
| {{dts|2016|June|24}}
| align=center| 3
| align=center| 5:00
| [[St. Louis, Missouri]], United States
| {{small|Catchweight (225 lb) bout.}}
|-
| {{no2}}Loss
| align=center| 14–5–1
| [[Jiří Procházka]]
| KO (head kick and knees)
| [[2015 in Rizin Fighting Federation#Rizin World Grand Prix 2015: Part 1 - Saraba|Rizin World Grand Prix 2015: Part 1 - Saraba]] 
| {{dts|2015|December|29}}
| align=center| 1
| align=center| 1:36
| [[Saitama (city)|Saitama]], Japan
| {{small|2015 Rizin Heavyweight Tournament Quarterfinals.}}
|-
| {{yes2}}Win
| align=center| 14–4–1
| Will Penn
| Submission (rear-naked choke)
| Inoki Genome Fight 4
| {{dts|2015|August|29}}
| align=center| 1
| align=center| 3:07
| [[Tokyo]], Japan
| 
|-
| {{yes2}}Win
| align=center| 13–4–1
| Nick Rossborough
| Submission (kimura)
| Inoki Genome Fight 3
| {{dts|2015|April|11}}
| align=center| 1
| align=center| 4:22
| [[Tokyo]], Japan
| 
|-
| {{no2}}Loss
| align=center| 12–4–1
| [[Mirko Cro Cop]]
| TKO (head kick and punches)
| Inoki Bom-Ba-Ye 2014
| {{dts|2014|December|31}}
| align=center| 2
| align=center| 5:00
| [[Tokyo]], Japan
| {{small|For the [[Inoki Genome Federation#IGF Championship|IGF Championship]].}}
|-
| {{no2}}Loss
| align=center| 12–3–1
| [[Mirko Cro Cop]]
| TKO (doctor stoppage)
| Inoki Genome Fight 2
| {{dts|2014|August|23}}
| align=center| 2
| align=center| 2:37
| [[Tokyo]], Japan
| {{small|Lost the [[Inoki Genome Federation#IGF Championship|IGF Championship]].}}
|-
| {{yes2}}Win
| align=center| 12–2–1
| [[Philip De Fries]]
| Decision (unanimous)
| Inoki Genome Fight 1
| {{dts|2014|April|05}}
| align=center| 2
| align=center| 5:00
| [[Tokyo]], Japan
| {{small|Non-title bout.}}
|-
| {{yes2}}Win
| align=center| 11–2–1
| [[Kazuyuki Fujita]]
| Decision (unanimous)
| Inoki Bom-Ba-Ye 2013
| {{dts|2013|December|31}}
| align=center| 3
| align=center| 5:00
| [[Tokyo]], Japan
| {{small|Won the [[Inoki Genome Federation#IGF Championship|IGF Championship]].}}
|-
| {{yes2}}Win
| align=center| 10–2–1
| [[Jeff Monson]]
| Decision (majority)
| M-1 Challenge 42
| {{dts|2013|October|20}}
| align=center| 3
| align=center| 5:00
| [[Saint Petersburg]], Russia
| 
|-
| {{yes2}}Win
| align=center| 9–2–1
| Clayton Jones
| TKO (punches)
| IGF: GENOME 27
| {{dts|2013|July|20}}
| align=center| 1
| align=center| 0:35
| [[Osaka, Japan|Osaka]], Japan
| 
|-
| {{yes2}}Win
| align=center| 8–2–1
| [[Pedro Rizzo]]
| Decision (unanimous)
| IGF: GENOME 26
| {{dts|2013|May|26}}
| align=center| 3
| align=center| 5:00
| [[Tokyo]], Japan
| 
|-
| {{yes2}}Win
| align=center| 7–2–1
| [[Kerry Schall]]
| Submission (armbar)
| IGF: GENOME 25
| {{dts|2013|March|20}}
| align=center| 1
| align=center| 2:43
| [[Fukuoka, Japan|Fukuoka]], Japan
| 
|-
| {{yes2}}Win
| align=center| 6–2–1
| [[Sean McCorkle]]
| Submission (kimura)
| IGF: GENOME 24
| {{dts|2013|February|23}}
| align=center| 1
| align=center| 2:41
| [[Tokyo]], Japan
| 
|-
| {{yes2}}Win
| align=center| 5–2–1
| [[Tim Sylvia]]
| Decision (unanimous)
| Inoki-Bom-Ba-Ye 2012
| {{dts|2012|December|31}}
| align=center| 3
| align=center| 5:00
| [[Tokyo]], Japan
| 
|-
| {{no2}}Loss
| align=center| 4–2–1
| [[Fedor Emelianenko]]
| KO (punches)
| [[Fight For Japan: Genki Desu Ka Omisoka 2011]]
| {{dts|2011|December|31}}
| align=center| 1
| align=center| 2:29
| [[Saitama, Saitama|Saitama]], Japan
|{{small|Return to heavyweight.}}
|-
| {{draw}}Draw
| align=center| 4–1–1
| [[Paulo Filho]]
| Draw
| Amazon Forest Combat 1
| {{dts|2011|September|14}}
| align=center| 3
| align=center| 5:00
| [[Manaus]], Brazil
| {{small|Light heavyweight debut.}}
|-
| {{yes2}}Win
| align=center| 4–1
| [[Jérôme Le Banner]]
| Decision (unanimous)
| [[Dynamite!! 2010]]
| {{dts|2010|December|31}}
| align=center| 3
| align=center| 5:00
| [[Saitama (city)|Saitama]], Japan
| 
|-
| {{yes2}}Win
| align=center| 3–1
| [[Katsuyori Shibata]]
| Technical Submission (kimura)
| [[K-1 World MAX 2010 World Championship Tournament Final]]
| {{dts|2010|November|08}}
| align=center| 1
| align=center| 3:30
| [[Tokyo]], Japan
| 
|-
| {{yes2}}Win
| align=center| 2–1
| [[Ikuhisa Minowa]]
| Decision (unanimous)
| [[Dream 16]]
| {{dts|2010|September|25}}
| align=center| 2
| align=center| 5:00
| [[Nagoya]], Japan
| 
|-
| {{yes2}}Win
| align=center| 1–1
| Tafa Misipati
| Submission (armbar)
| X-plosion: New Zealand vs. Japan
| {{dts|2010|May|15}}
| align=center| 1
| align=center| 2:42
| [[Auckland]], New Zealand
| 
|-
| {{no2}}Loss
| align=center| 0–1
| [[Hidehiko Yoshida]]
| Decision (unanimous)
| [[Dynamite!! 2009|Dynamite!! The Power of Courage 2009]]
| {{dts|2009|December|31}}
| align=center| 3
| align=center| 5:00
| [[Saitama (city)|Saitama]], Japan
| 
{{end}}

==Kickboxing record==
{{Kickboxing record start|norec=y|title=Professional Kickboxing Record|record='''3 Wins''' (1 (T)KO's, 2 Decisions), '''1 Loss, 0 Draws, 0 No Contests'''}}
|- style="background:#fbb;"
| 2023-03-12 || Loss||align=left|{{flagicon|JPN}} [[Kyotaro Fujimoto]] || [[2023 in K-1#K-1 World GP 2023: K'Festa 6|K-1 World GP 2023: K'Festa 6]] || [[Tokyo, Japan]] || Decision (Unanimous)||3  || 3:00
|-
|- style="background:#cfc"
| 2022-04-03 || Win ||align=left|{{flagicon|JPN}} Kosuke Jitsukata || [[2022 in K-1#K-1: K'Festa 5|K-1: K'Festa 5]], Tournament Quarterfinals || [[Tokyo]], [[Japan]] || KO (Left straight) || 2 || 1:02
|-
! style=background:white colspan=9 |{{small|Ishii withdrew from the tournament due to injury.}}
|-  style="text-align:center; background:#cfc"
| 2021-12-04 || Win || align=left|{{flagicon|JPN}} Rui || [[2021 in K-1#K-1 World GP 2021 in Osaka|K-1 World GP 2021 in Osaka]] || [[Osaka]], [[Japan]] || Decision (Unanimous) || 3 || 3:00
|-
|- style="background:#cfc"
| 2021-09-20 || Win ||align=left|{{flagicon|JPN}} [[Ryo Aitaka]] || [[2021 in K-1#K-1 World GP 2021: Yokohamatsuri|K-1 World GP 2021: Yokohamatsuri]] || [[Yokohama]], [[Japan]] || Ext. R. Decision (Unanimous) || 4 || 3:00
|-
| colspan=9 | '''''Legend''''': {{legend2|#CCFFCC|Win |border=1px solid #CCFFCC}} {{legend2|#FFBBBB|Loss |border=1px solid #FFBBBB}} {{legend2|#c5d2ea|Draw/No contest |border=1px solid #c5d2ea}} {{legend2|White|Notes |border=1px solid #AAAAAA}}
{{end}}

==Professional boxing record==
{{BoxingRecordSummary
|draws= 1
|nc=
|ko-wins=
|ko-losses=
|dec-wins= 1
|dec-losses=
|dq-wins=
|dq-losses=
}}
{|class="wikitable" style="text-align:center"
|-
!{{abbr|No.|Number}}
!Result
!Record
!Opponent
!Type
!Round, time
!Date
!Location
!Notes
|-
|2
|{{draw}}Draw
|1–0–1
|align=left|Chang Soo Han
|MD
|4
|6 Jan 2023
|align=left|{{small|EDION Arena Osaka, Osaka, Japan}}
|align=left|
|-
|1
|{{yes2}}Win
|1–0
|align=left|Shuho Takayama
|{{abbr|MD|Majority decision}}
|4
|14 Aug 2022
|align=left|{{small|EDION Arena Osaka, Osaka, Japan}}
|align=left|
|-
|}

==Submission grappling record==
{| class="wikitable sortable" style="font-size:80%; text-align:left;"<!-- width:100%; -->
|-
| colspan=8 style="text-align:center;" | '''5 Matches, 1 Win, 1 Loss, 3 Draws'''
|- style="text-align:center; background:#f0f0f0;"
| style="border-style:none none solid solid; "|'''Result'''
| style="border-style:none none solid solid; "|'''Record'''
| style="border-style:none none solid solid; "|'''Opponent'''
| style="border-style:none none solid solid; "|'''Method'''
| style="border-style:none none solid solid; "|'''Event'''
| style="border-style:none none solid solid; "|'''Date'''
| style="border-style:none none solid solid; "|'''Division'''
| style="border-style:none none solid solid; "|'''Location'''
|-
|{{no2}}Loss||style="text-align:center;"|1–1–3||{{flagicon|GBR}} Daniel Strauss || Points || Polaris 8 || December 9, 2018|| Superfight||{{flagicon|GBR}} [[Cardiff]]
|-
|{{yes2}}Win||style="text-align:center;"|1–0–3||{{flagicon|USA}} [[Frank Mir]] || DQ || [[Quintet (grappling)|Quintet 3]] || October 5, 2018|| Superfight|| {{flagicon|USA}} [[Las Vegas]], [[Nevada|NV]]
|-
|{{draw}}Draw||style="text-align:center;"|0–0–3||{{flagicon|USA}} Geo Martinez || Draw || [[Quintet (grappling)|Quintet 2]] || July 15, 2018 || Absolute || {{flagicon|JPN}} [[Tokyo]]
|-
|{{draw}}Draw||style="text-align:center;"|0–0–2||{{flagicon|BRA}} Marcos de Souza || Draw || [[Quintet (grappling)|Quintet]] || April 11, 2018|| Absolute|| {{flagicon|JPN}} [[Tokyo]]
|-
|{{draw}}Draw||style="text-align:center;"|0–0–1||{{flagicon|Belarus}} [[Vladimir Matyushenko]] || Draw || Metamoris 7 || July 17, 2016|| Superfight|| {{flagicon|USA}} [[Los Angeles, CA]]
|-
{{s-end}}

==References==
{{Reflist}}

==External links==
{{Commons category}}
* {{Sports links|maxlink=14}}
* {{Sports reference}}
* {{The-Sports}}
* [https://teekostore.com/collections/satoshi-ishii Official Satoshi Ishii Tee KO Merch]

{{Footer Olympic Champions Judo Heavyweight Men}}
{{All-Japan Judo Champions}}
{{Authority control}}

{{DEFAULTSORT:Ishii, Satoshi}}
[[Category:1986 births]]
[[Category:Living people]]
[[Category:Asian Games medalists in judo]]
[[Category:Asian Games silver medalists for Japan]]
[[Category:Croatian male mixed martial artists]]
[[Category:Heavyweight mixed martial artists]]
[[Category:Japanese emigrants to Croatia]]
[[Category:Japanese expatriate sportspeople in Croatia]]
[[Category:Japanese male judoka]]
[[Category:Japanese male kickboxers]]
[[Category:Japanese male boxers]]
[[Category:Japanese male mixed martial artists]]
[[Category:Judoka at the 2006 Asian Games]]
[[Category:Judoka at the 2008 Summer Olympics]]
[[Category:Light heavyweight mixed martial artists]]
[[Category:Medalists at the 2006 Asian Games]]
[[Category:Medalists at the 2008 Summer Olympics]]
[[Category:Mixed martial artists utilizing judo]]
[[Category:Mixed martial artists utilizing kickboxing]]
[[Category:Mixed martial artists utilizing Brazilian jiu-jitsu]]
[[Category:Naturalized citizens of Croatia]]
[[Category:Olympic judoka for Japan]]
[[Category:Olympic gold medalists for Japan]]
[[Category:Olympic medalists in judo]]
[[Category:Sportspeople from Ibaraki, Osaka]]
[[Category:Martial artists from Osaka Prefecture]]
[[Category:Recipients of the Medal with Purple Ribbon]]
[[Category:Summer World University Games medalists in judo]]
[[Category:FISU World University Games gold medalists for Japan]]
[[Category:Medalists at the 2007 Summer Universiade]]