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Taichi Kokubun 国分 太一
Kokubun in 2018
Background information
Born	(1974-09-02)September 2, 1974 (age 51)
Origin	Higashikurume, Tokyo,Japan
Genres	Rock
Occupations	Keyboardist actor
Instruments	Electronic keyboard piano
Years active	1988–2025 (indefinite hiatus)
Labels	Sony Music Entertainment Universal Music Japan Storm Labels

Taichi Kokubun (国分 太一,Kokubun Taichi; born September 2, 1974) is aJapanesekeyboardist andactor.^[1][2] He plays keyboard forTokio, a musical group ofStarto Entertainment formerly known asJohnny & Associates.

Taichi Kokubun was born inHigashikurume, Tokyo.

Before debuting withTokio, Kokubun, like other Tokio members, was a backup-dancer forJohnny's Entertainment boy bands, includingHikaru Genji.^[3] In 1990 he became the keyboardist of Tokio, but it was not until 1994 that the band debuted.^[3]

In 2004, Kokubun took a break from Tokio to form a temporary group withKinKi Kids memberTsuyoshi Domoto.^[3] Together they released the theme song toFantastipo, a movie in which they starred.

Kokubun began his acting career with a role inAbunai Shōnen III, a 1989 Japanese drama. Since 1993, he has played parts in drama shows and movies such asFantistipo andShaberedomo Shaberedomo.

He has hostedGachinko! with otherTokio members.^[2] Currently Kokubun hostsKaitai Shin Show andShonen Club Premium onNHK,Tetsuwan Dash andGuruguru Ninety-Nine onNTV,R30 andSekai Kurabete Mitara onTBS,Mentore G onFuji TV, andAura no Izumi onTV Asahi.^[4]

In April 2009, Kokubun became asportscaster for theFuji TV showSports!.^[5]

On June 20, 2025, on a press conference offered byNippon Television president Hiroyuki Fukuda, it was announced that Kokubun would step down from his hosting duties onTetsuwan Dash [ja] due to "multiple compliance-related incidents in the past" not crime related, without explaining the details, because of privacy protection. Kokubun himself accepted the decision taken by the broadcaster, and apologized for the trouble caused. It was also informed that he would take an indefinite leave of absence.^[6][7][8][9] Compliance officers of the broadcaster have revealed that the case is about sexual harassment. Other broadcasters are considering removing Kokubun from their programs. Some sponsors, such as Japanet Holdings, have started removing ads on which he appears.^[10] As a result,TV Tokyo cancelled the planned June 22nd broadcast ofDanshi Godan [ja] and was dropped from the 2025 edition of theTV Tokyo Music Festival [ja].^[11]Mainichi Broadcasting System also followed suit by cancelling the planned June 21st broadcast ofTokio Terrace [ja].^[12]TBS announced on June 24th that it has dropped him fromSekai Kurabete Mitara [ja]. Since the show's episodes are recorded in advance, Kokubun would be edited out from the batch of episodes that TBS had scheduled to air at that time.^[13]

On November 26, 2025, Kokubun held a press conference where he apologized to everyone affected over the issue that ended his participation as a Tokio member, as well as the suspension of his activities. He also informed about his lawyer filing a petition for human rights relief with the Japan Federation of Bar Associations in October over the response that Nippon Television had, resulting in Kokubun's decision to step down from "The Tetsuwan Dash".^[14][15]

• Taichi Kokubun atIMDb
• Tokio Official Website

• 1974 births
• Living people
• People from Higashikurume, Tokyo
• Japanese male actors
• Japanese keyboardists
• Tokio (band) members
• Starto Entertainment

• CS1 Japanese-language sources (ja)
• Articles with short description
• Short description is different from Wikidata
• Biography articles needing translation from Japanese Wikipedia
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