Kyosei-kai

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

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

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. Notably the Kyosei-kai has been in conflict with the Yamaguchi-gumi, the largest yakuza syndicate, since the early 1960s.

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.

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.

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