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 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 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.
In popular culture
- 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
- "Police of Japan 2011, Criminal Investigation : 2. Fight Against Organized Crime", December 2009, National Police Agency
- "The Fourth Kyosei-kai", 20 February 2008, Matsue Joho Center (Japanese)
- "1993 Police White Paper Chapter 1 : The Actual Condition of the Boryokudan", 1993, National Police Agency (Japanese)
- "Chitizens standing up against boryokudan conflicts", Yomiuri Shimbun (Japanese)