The Shinwa-kai is a Japanese yakuza organization based in Shikoku. Founded in 1971, the gang has been based at Takamatsu since its formation and joined the anti-Yamaguchi-gumi Gosha-kai federation in 1996.
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The Shinwa-kai is a Japanese yakuza organization based in Shikoku. Founded in 1971, the gang has been based at Takamatsu since its formation and joined the anti-Yamaguchi-gumi Gosha-kai federation in 1996.