22/7 (group)

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Nanabun no Nijuuni.jpg
22/7 characters. From top left: Miyako, Reika, Akane, Jun, Sakura, Miu, Nicole, and Ayaka. (Not pictured: Yuki, Tsubomi and Mikami)
Background information
Also known asNanabun no Nijūni
Years active2017–present
LabelsSME Records
Columbia Records
Websitewww.nanabunnonijyuuni.com Edit this at Wikidata
  • Reina Miyase (Ayaka Tachikawa)
  • Mizuha Kuraoka (Miyako Kōno)
  • Chiharu Hokaze (Reika Satō)
  • Nagomi Saijō (Miu Takigawa)
  • Ruri Umino (Jun Toda)
  • Sally Amaki (Sakura Fujima)
  • Kanae Shirozawa (Akane Maruyama)
  • Moe Suzuhana (Mikami Kamiki)
  • Urara Takasuji (Yuki Tojo)
  • Aina Takeda (Tsubomi Hiragi)
Past members
  • Mei Hanakawa (Nicole Saitō)

22/7 (read as Nanabun no Nijūni (ナナブンノニジュウニ)) is a Japanese idol girl group multimedia project between Yasushi Akimoto, Aniplex, and Sony Music Records. The project is described as "idols who transcend dimensions." The members consist of voice actresses who provide the voice and motion capture for their characters, as well as perform as a musical group.

22/7's variety show, 22/7 Keisanchū, began on July 7, 2018 on Tokyo MX.[1] An anime television series of the same name by A-1 Pictures is set to premiere on January 11, 2020.


An audition for 8 characters, which included both a CD debut and an anime, was held until December 17, 2016, with the final examination taking place on December 24, 2016.[2] On December 25, 2016, the idol group name was revealed as 22/7, which was chosen because it is an approximation to the mathematical constant , which is an irrational, transcendental number.[3] Among 10,325 applicants, 11 voice actresses were chosen through voting, with only the first 8 characters announced.[4] The group held their debut showcase on June 16, 2017,[5] and an animated adaptation was announced during their first live event on July 22, 2017.[6] 22/7's first single, "Boku wa Sonzai Shiteinakatta", was released on August 22, 2017, with the jacket designs illustrated by Yukiko Horiguchi.[7] The music video was animated by Tatsunoko Production.[7]

On April 11, 2018, 22/7 released their second single, "Shampoo no Nioi ga Shita", with the CD visuals designed by Horiguchi again.[8] A series of animated character shorts were also released.[9] To promote the group's upcoming activities, 22/7 launched individual social media channels for the characters, including YouTube.[1] 22/7's variety show, 22/7 Keisanchū, was broadcast on Tokyo MX beginning July 7, 2018.[1]

22/7's third single, "Rikaisha", was released on August 22, 2018. The song was promoted during their annual live event on July 22, 2018, where they also announced Chiharu Hokaze had been elected the leader of the group.[10] "Rikaisha" debuted at #7 on the Oricon Daily Singles Chart.[11] On September 21, 2018, the last 3 characters for the remaining members of the group were revealed during a promotional event.[12]

On July 22, 2019, the music video for their fourth single, "Nani mo Shite Agerarenai" (何もしてあげられない) was released, becoming the first of their releases to reveal all 11 characters. The single was released on August 21, 2019, with the disc debuting in 4th with 29,000 units sold in its first week on the Oricon Weekly Singles Chart.

On December 11, 2019, it was announced that Mei Hanakawa would leave the group by the end of the year due to health issues, as the doctor determined that it would be difficult to recover her health if she maintained her performing career due to how her physical constitution is. [13]


Miyako Kōno (河野 都, Kōno Miyako)
Voiced by: Mizuha Kuraoka[14][4]
Miyako is an egoistical girl who speaks in Kansai dialect. She is 15 years old. Miyako is designed by Mieko Hosoi.[15][16]
Nicole Saitō (斎藤 ニコル, Saitō Nikoru)
Voiced by: Mei Hanakawa[14]
17 years old. Nicole is designed by Kurehito Misaki.[15]
Reika Satō (佐藤 麗華, Satō Reika)
Voiced by: Chiharu Hokaze[14]
17 years old. Student council and honor student. Reika is designed by Hirokazu Koyama.[15][16]
Miu Takigawa (滝川 みう, Takigawa Miu)
Voiced by: Nagomi Saijō[14][4]
16 years old, Miu is a bit of an ignorant otaku who covers her eyes with her hair bangs. Miu is designed by Yukiko Horiguchi.[15][16]
Ayaka Tachikawa (立川 絢香, Tachikawa Ayaka)
Voiced by: Reina Miyase[14][4]
An aggressive and militant girl. Ayaka is 16 years old. She is designed by Koharu Sakura.[15][16]
Jun Toda (戸田 ジュン, Toda Jun)
Voiced by: Ruri Umino[14][4]
16 years old. Jun is a high class girl who behaves like a tsundere. She is designed by Masayoshi Tanaka.[15][16]
Sakura Fujima (藤間 桜, Fujima Sakura)
Voiced by: Sally Amaki[14][4]
Sakura is the 17-year-old daughter of a good family. She has a sunny personality with a dark side.[17] Her friends call her "Ranran." Originally, Sakura was not written as an English speaker, but after noticing Amaki had drawn in a large overseas fanbase, she was rewritten as an English speaker who had grown up overseas.[18] She is designed by Kantoku.[15][16]
Akane Maruyama (丸山 あかね, Maruyama Akane)
Voiced by: Kanae Shirozawa[14][4]
17 years old. She is designed by Tometa Ohara.[15]
Mikami Kamiki (神木みかみ, Kamiki Mikami)
Voiced by: Moe Suzuhana[14][4]
She is designed by Kouhaku Kuroboshi.[15] She was revealed as a character in September 2018.[12]
Yuki Tojo (東条悠希, Tōjō Yūki)
Voiced by: Urara Takasuji[14][4]
She is designed by Akio Watanabe.[15] She was revealed as a character in September 2018.[12]
Tsubomi Hiragi (柊つぼみ, Hīragi Tsubomi)
Voiced by: Aina Takeda[14][4]
She is designed by Mel Kishida.[15] She was revealed as a character in September 2018.[12]


Title Year Peak positions Sales

"Boku wa Sonzai Shiteinakatta"
2017 10 52
"Shampoo no Nioi ga Shita"
2018 8 18
"Rikaisha" (理解者) 14 30
"Nani mo Shite Agerarenai" (何もしてあげられない) 2019 4 TBA



Year Title Network Notes
2018–present 22/7 Keisanchū (22/7 計算中) Tokyo MX 22/7's variety show
2020 22/7 Tokyo MX Anime adaptation


  1. ^ a b c "秋元康氏総合プロデュース、22/7(ナナブンノニジュウニ)初のテレビ番組&バーチャルYouTuber企画がスタート!! そして待望の3rdシングル発売決定!!" (in Japanese). Niconico News. 2018-06-14. Retrieved 2018-06-30.
  2. ^ Komatsu, Mikikazu. "AKB48 Producer Yasushi Akimoto Plans New 2D/3D Idol Project". Crunchyroll. Crunchyroll. Retrieved 27 December 2016.
  3. ^ "秋元康氏プロデュースアイドル「22/7」、配役&素顔公開". Oricon (in Japanese). 2017-05-19. Retrieved 2018-06-30.
  4. ^ a b c d e f g h i j Karen Ressler (2017-05-20). "Voice Actresses Revealed for Yasushi Akimoto-Produced Idol Unit 22/7". Anime News Network. Retrieved 2018-06-30.
  5. ^ "秋元康氏プロデュース「22/7」ら8組競演 ソニーイチ押し新人ライブ". Oricon (in Japanese). 2017-06-16. Retrieved 2018-06-30.
  6. ^ "秋元康氏プロデュースアイドル「22/7」涙の初ライブ 9・20メジャーデビュー&アニメ化決定" (in Japanese). Oricon. July 22, 2017. Retrieved June 30, 2018.
  7. ^ a b "22/7、堀口悠紀子氏の描き下ろし新ビジュアル公開". Oricon (in Japanese). 2017-08-04. Retrieved 2018-06-30.
  8. ^ Komatsu, Mikikazu (2017-02-18). ""K-ON!," "Tamako Market" Character Designer Draws Digital Idol Group 22/7's 2nd Single Visual". Crunchyroll News. Retrieved 2018-07-01.
  9. ^ Sherman, Jennifer (2018-05-30). "22/7 Idol Project's 1st 2 Anime Character Videos Stream Outside Japan". Anime News Network. Retrieved 2018-06-30.
  10. ^ "22/7(ナナブンノニジュウニ)、3rdシングル「理解者」を初披露!リーダーに任命された帆風千春さんの抱負は――". Animate Times (in Japanese). 2018-07-28. Retrieved 2018-08-21.
  11. ^ "デイリー シングルランキング". Oricon (in Japanese). 2018-08-22. Retrieved 2018-08-22.
  12. ^ a b c d "22/7がデビュー1周年の日に冠番組イベント開催、念願の新キャラクター発表に号泣". Natalie (in Japanese). 2018-09-21. Retrieved 2018-10-28.
  13. ^ Egan Loo (2019-12-11). "22/7 Idol Mei Hanakawa to Leave Group Before Anime's Premiere". Anime News Network. Retrieved 2019-12-11.
  14. ^ a b c d e f g h i j k "ARTIST". 22/7 – ナナブンノニジュウニ (in Japanese). Retrieved 22 July 2017.
  15. ^ a b c d e f g h i j k "秋元康 デジタルアイドル グループ名は『22/7』". ローチケHMV (in Japanese). Retrieved 27 December 2016.
  16. ^ a b c d e f "Yasushi Akimoto's New Idol Group That 'Crosses Dimensions' Reveals 4 Character Designs". Anime News Network. Retrieved 27 December 2016.
  17. ^ Aniplex USA [@aniplexusa] (2017-10-24). "Sally Amaki fans! We got a special comment video where Sally wants to say a few things to her fans! Check it out! #天城サリー #ナナブンノニジュウニ" (Tweet). Retrieved 2018-06-30 – via Twitter.
  18. ^ St. Michel, Patrick (2018-07-27). "Sally Amaki's life as an animated idol-pop star". The Japan Times. Retrieved 2018-07-27.
  19. ^ Sources for chart positions are as follows:
  20. ^ Sources for chart positions are as follows:
  21. ^ "オリコン週間 シングルランキング 2017年09月18日~2017年09月24日" (in Japanese). Oricon. 2017-10-02. Archived from the original on 2017-09-27. Retrieved 2018-09-28.
  22. ^ "オリコン週間 シングルランキング 2018年04月09日~2018年04月15日" (in Japanese). Oricon. 2018-04-09. Archived from the original on 2018-04-18. Retrieved 2018-09-28.
  23. ^ "週間 シングルランキング 2018年09月03日付". Oricon News (in Japanese). Oricon. Archived from the original on 2018-08-29. Retrieved 2018-09-02.
  24. ^ "週間 CDシングルランキング 2019年09月02日付" [Weekly CD Single Ranking for September 2, 2019] (in Japanese). Oricon. Retrieved August 28, 2019.

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