The Sumiyoshi-kai is the second-largest yakuza group in Japan, based in Tokyo, with an estimated 2,100 members. It operates primarily in upscale districts such as Kabukichō and Ginza, engaging in protection rackets. Founded in 1958 by Jusaku Abe, it is a confederation of smaller gangs with a looser chain of command than its rival, the Yamaguchi-gumi. The group has undergone several name changes and reorganizations, and remains active as of 2020.
CRIMENET has extracted 15 linkages for this organization, including 4 cooperative ties across 4 organizations, 5 conflicts across 2 organizations and 6 other connections.