Ichiwa-kai

thumb|Daimon of Ichiwa-kai The Ichiwa-kai (一和会) was a yakuza gang based in Osaka, Japan.

It was formed on June 13, 1984 when Hiroshi Yamamoto, a top lieutenant in the Yamaguchi-gumi, broke from that gang to form his own organization with over 10,000 members. The split stemmed from professional jealousy: Yamamoto had been seen as a contender for the role of kumicho, or Godfather, in the Yamaguchi-gumi, and was enraged when a rival, Masahisa Takenaka, was chosen.