Tōhai

• Genre — Sports (mahjong), suspense • Ja Kanji — 凍牌

• Type — manga • Author — Kōji Shinasaka • Publisher — Akita Shoten • Magazine — Young Champion • Imprint — Young Champion Comics • First — June 27, 2006 • Last — April 12, 2011 • Volumes — 12

• Type — manga • Title — Tōhai: Hitobashira-hen • Author — Kōji Shinasaka • Publisher — Akita Shoten • Magazine — Young Champion • Imprint — Young Champion Comics • First — May 10, 2011 • Last — May 23, 2017 • Volumes — 16

• Type — live film • Director — Yūichi Onuma • Writer — Yūichi Onuma • Music — Taku Unami • Studio — KZ Entertainment • Released — 2013 5 18

• Type — manga • Title — Tōhai: Minagoroshi-hen • Author — Kōji Shinasaka • Publisher — Akita Shoten • Magazine — Young Champion • Imprint — Young Champion Comics • First — September 26, 2017 • Last — June 8, 2021 • Volumes — 10

• Type — manga • Title — Tōhai: Cold Girl • Author — Kōji Shinasaka • Publisher — Akita Shoten • Magazine — Young Champion • Imprint — Young Champion Comics • First — September 28, 2021 • Volumes — 12

• Type — TV Series • Director — Jun Hatori • Writer — Mariko Kunisawa • Music — * Yūsuke Shirato • Yuki Kishida • Studio — East Fish Studio • Network — MBS, TBS, BS-TBS, RKB, HBC • First — October 5, 2024 • Last — April 5, 2025 • Episodes — 25 Tōhai is a Japanese manga series written and illustrated by Kōji Shinasaka. It was serialized in Akita Shoten's seinen manga magazine Young Champion from June 2006 to April 2011. A sequel manga, Tōhai: Hitobashira-hen, was serialized in Young Champion from May 2011 to May 2017. A third series, Tōhai: Minagoroshi-hen, was serialized in Young Champion from September 2017 to June 2021. A fourth series, Tōhai: Cold Girl, has been serialized in Young Champion since September 2021. A live-action film adaptation premiered in Japan in May 2013, and an anime television series adaptation produced by East Fish Studio aired from October 2024 to April 2025.

Money, women, organs. Kei, a high school boy, frequents the underground mahjong parlor teeming with desires, earning him the moniker 'K of the ICE' in the underworld due to his cold-hearted strategy and stylish gameplay. Rumors also circulate that he keeps a girl at his home.

• Kei • Kohsuke Tanabe • Dōjima • Shunsuke Takeuchi • Amina • Fairouz Ai • Noriyuki Takatsu • Tsuyoshi Koyama • Yū Katsuragi • Chinatsu Akasaki • Hideharu Seki • Toshihiko Seki • Hatakeyama • Takehito Koyasu • Ai • Yoko Hikasa

Written and illustrated by Kōji Shinasaka, Tōhai was serialized in Akita Shoten's seinen manga magazine Young Champion from June 27, 2006, to April 12, 2011, with its chapters collected into twelve tankōbon volumes. A sequel manga, titled Tōhai: Hitobashira-hen, was serialized in the same magazine from May 10, 2011, to May 23, 2017, and was collected into sixteen volumes. A third series, titled Tōhai: Minagoroshi-hen, was serialized in the same magazine from September 26, 2017, to June 8, 2021, and was collected into ten volumes. A fourth series, titled Tōhai: Cold Girl, began serialization in the same magazine on September 28, 2021, and has been collected into twelve volumes as of May 2026.

An anime television series adaptation was announced on January 11, 2024. It is produced by East Fish Studio and directed by Jun Hatori, with Mariko Kunisawa overseeing series scripts, Sayaka Anesaki designing the characters, and Yūsuke Shirato and Yuki Kishida composing the music. The series aired from October 5, 2024, to April 5, 2025, on the Animeism programming block on MBS, TBS, and BS-TBS. The opening theme song is "Gambling Hall", performed by Masayoshi Ōishi, while the first ending theme song is "Plastic Showcase" performed by Taiyo to Odore, Tsukiyo ni Utae, and the second ending theme song is "Tumbling Dice", performed by Enako and Kayano Kusano. As of January 29, 2025, the anime has been released on Pony Canyon's YouTube channel.