From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Daimon of Kyosei-kai

The Kyosei-kai (共政会, Kyōsei-kai) is a yakuza group based in Hiroshima, Japan,[1] with an estimated 280 active members and 470 semi-active members.[2] The Kyosei-kai is the largest yakuza organization in the Chugoku region.[2]


The Kyosei-kai was formed in May 1964 from seven yakuza clans united by bakuto Tatsuo Yamamura.[3]


The Kyosei-kai is known for its history of fierce conflicts with various other yakuza groups, and therefore, the Kyosei-kai is thought to be most responsible for creating Hiroshima's "town of violence" image.[4] Notably the Kyosei-kai has been in conflict with the Yamaguchi-gumi, the largest yakuza syndicate, since the early 1960s.[2]

The Kyosei-kai was a leading member of two anti-Yamaguchi federations, the Kansai Hatsuka-kai (formed in 1970) and the Nishinippon Hatsuka-kai (formed in 1989), and has formed a new anti-Yamaguchi federation named the Gosha-kai since 1996 with three other Chugoku-based organizations, the Kyodo-kai, the Asano-gumi, the Goda-ikka, and the Shikoku-based Shinwa-kai.[2]

In popular culture[edit]

The Battles Without Honor and Humanity yakuza film series is based on actual 20th-century yakuza conflicts engaged in by Hiroshima yakuza syndicates, particularly the events leading up to the formation of the Kyosei-kai.[4]


  • 1st (1964–1965): Tatsuo Yamamura
  • 2nd (1965–1970): Takeshi Hattori
  • 3rd (1970–1987): Hisashi Yamada
  • 4th (1990–2003): Isao Okimoto
  • 5th (2004–present): Atsumu Moriya