Yakuza groups

is Japan's largest yakuza organization. It is named after its founder Harukichi Yamaguchi. Its origins can be traced back to a loose labor union for dockworkers in Kobe before World War II.

The , sometimes referred to as the , is the second-largest yakuza group in Japan with an estimated 2,100 members.

The is the third largest of Japan's yakuza groups, with approximately 1,600 members. It is based in the Kantō region, and was one of the first yakuza organizations to begin operating overseas.

thumb|upright|Mon (emblem)|Daimon of Azuma-gumi The is a yakuza organization based in Osaka, Japan. The Azuma-gumi is a designated yakuza group with an estimated 50 active members.

splinter group of the Yamaguchi-gumi

The is a yakuza organization based in Osaka, Japan.

thumb|upright|Mon (emblem)|Daimon of Soai-kai The is a yakuza organization based in Chiba, Japan. The Soai-kai is a designated yakuza group with an estimated 80 active members.

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

The is a yakuza group based in Okayama, Japan. The Asano-gumi is a designated yakuza group.

The is a yakuza group based in Hiroshima, Japan.

The is a yakuza organization based in Tokyo, Japan.

The , meaning "Pine Needle Society," is a yakuza organization based in Tokyo, Japan. The Matsuba-kai is a designated yakuza group with an estimated 280 active members as of 2024.

The (sometimes written Aizu-Kotetsukai or Aizu Kotetsu-kai) is a yakuza organization in Japan based in Kyoto. Its name comes from the Aizu region, "Kotetsu", a type of Japanese sword, and the suffix "-kai", or society.