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The Kodo-kai (弘道会 Kōdō-kai, Koh-doh-kai) is a yakuza criminal organization based in Nagoya, Japan.[1] It is a secondary organization of the Sixth Yamaguchi-gumi, the largest known yakuza syndicate in Japan.[2] With an estimated membership of 5,000,[3] it is the second-largest Yamaguchi affiliate after the Yamaken-gumi, and operates in at least 18 prefectures.[4]

The daimon of the Kodo-kai

The Kodo-kai is under close surveillance by the National Police Agency, as the NPA considers the organization to not be a traditional yakuza organization, but to be more like a mafia-type organization or terrorist organization.[5] The Kodo-kai is notorious for its defiant attitude toward the official, and has dispensed with the yakuza's traditional policy of co-operating with the police.[3]

The Kodo-kai has been one of the wealthiest clans in the Yamaguchi-gumi, with an immense working capital estimated at around $5 billion.[5]


The Kodo-kai was founded in 1984 by Shinobu Tsukasa[6] with 24 other members including Kiyoshi Takayama.[5] At this time, Tsukasa became a formal member of the Fourth Yamaguchi-gumi. When the Fifth Yamaguchi-gumi started in May 1989, Tsukasa assumed the position of wakagashira-hosa (one of the third-ranking bosses).

The Kodo-kai's territories include Sakae, the largest downtown in the Nagoya area.[7]

Kiyoshi Takayama was promoted to the number-two boss (wakagashira) in 1989, and to the 2nd president (kaicho) in March 2005.[6] The Kodo-kai expanded under Takayama's administration,[6] and by late 2009 its total membership reached 4,000.[5]

Takayama became a formal member of the Fifth Yamaguchi-gumi in April, 2005, and assumed the position of wakagashira-hosa in June, 2005. And when Tsukasa became the kumicho (Godfather) of the Sixth Yamaguchi-gumi in July 2005, his Kodo-kai partner Takayama was given the position of the wakagashira (number-two boss) on August 8.[8]


1st (1984–2005)[edit]

Shinobu Tsukasa, also one of the third-ranking bosses (wakagashira-hosa) of the Fifth Yamaguchi-gumi and the founding head of the Tsukasa-kogyo. He would later become the head of the Hirota-gumi and the supreme boss of the Sixth Yamaguchi-gumi.

2nd (2005–)[edit]

Kiyoshi Takayama who is the number-two boss (wakagashira) of the Sixth Yamaguchi-gumi and the founding head of the Takayama-gumi, and former chief director (rijicho) of the Ryoshin-kai.


Described as a "financial mafia" by a former officer of the Aichi Prefectural Police Department, the Kodo-kai's activities include banking or investment banking for the criminal underworld.[5] The Kodo-kai is allegedly also very active and powerful in traditional "yakuza-friendly" businesses, such as the real estate business, securities business and show business.[9]

A senior member of an other Yamaguchi-affiliate has revealed that the Kodo-kai manages a private intelligence organization which specializes in espionage including police-targeted intelligence.[10]

According to Japanese media sources, the organization is among the most profitable of all the Yakuza factions in Japan. Kodo-kai reportedly raked in an immense amount of money by being the sole supplier of rock, sand, and gravel for the Chūbu Centrair International Airport construction project. The organization continues to earn large revenue by controlling the stevedoring and warehousing companies at the Port of Nagoya, and having a monopoly on sex-oriented establishments in the Nagoya area.[11]


The Kodo-kai's known branch organizations have included :

among others.


  1. ^ "Nation's No. 2 gangster arrested", November 19, 2010, Daily Yomiuri
  2. ^ "Police anti-gang drive in trouble", December 11, 2010, Asahi Shimbun
  3. ^ a b "Yakuza chief arrested in Japan", November 18, 2010, The Guardian
  4. ^ "Police wary as Yamaguchi-gumi prepares to fete sixth don", August 19, 2005, The Japan Times
  5. ^ a b c d e "The "Top Operations" for destroying the Yamaguchi-gumi Kodo-kai, arresting from the kumicho to the number 3", December 17, 2010, Weekly Friday (Japanese)
  6. ^ a b c "2010 Police White Paper Chapter 2 : Furtherance of Organized Crime Countermeasures, Columun 1 : Kodo-kai Countermeasures", 2010, National Police Agency (Japanese)
  7. ^ "Police internal document with a strategy for destroying the 'Kodo-kai'", July 7, 2010, Gendai Business (Japanese)
  8. ^ "From rackets to real estate, yakuza multifaceted", February 14, 2007, The Japan Times
  9. ^ "Police's 'Yamaguchi-gumi Cleanup Operation' behind the O-zumo's 'Baseball Gambling'", July 1, 2010, Gendai Business (Japanese)
  10. ^ "Muddy Stream of Doubt : One year until the Yamaguchi-gumi kumicho's prison release, Will there be any 'industry reorganization'? Boryokudan maneuver to assemble information" 2/5, May 2, 2010, Sankei Shimbun (Japanese)
  11. ^ Sentaku Magazine (reprinted in the Japan Times), "Kodo-kai still raking in funds despite tougher yakuza laws", 23 October 2015
  12. ^ "The Kodo-kai Kyushu top is arrested, relating to the construction works for the Nagasaki University Hospital", June 25, 2011, Yomiuri Shimbun (Japanese)
  13. ^ "Yamaguchi-gumi Kodo-kai affiliate kumicho is arrested, on suspicion of extorting", January 29, 2011, 47 News (Japanese)
  14. ^ "Kodo-kai affiliate kumicho is arrested, on suspicion of a car loan fraud", January 21, 2011, Chiba Nippo (Japanese)
  15. ^ "Nine are arrested for unregistered loaning, the system finance belonging to the Kodo-kai", January 18, 2011, 47 News (Japanese)
  16. ^ "Kodo-kai wakagashira-hosa is arrested on suspicion of fraud — Aomori, Nagano Police", December 4, 2010, Asahi Shimbun (Japanese)
  17. ^ "The background of the arrest of the wakagashira Kiyoshi Takayama, is a fierce conflict for the 'Kyoto concession'!", November 25, 2010, Gendai Business (Japanese)