Japan Organized Crime Boss (Japanese: 日本暴力団 組長, Hepburn: Nihon Bōryoku-dan: Kumichō, lit.

Hamanaka's right-hand man, Tetsuo Tsukamoto, is released after spending eight years in prison and learns that his wife committed suicide.

With his dying breath, he passes control of the gang to Tsukamoto, urging him to reject the Danno Organization and fight to keep them out of Yokohama.

The Hokuryu Kai, a gang led by the drug-addicted Miyahara, is expelled from the Tokyo Alliance for showing disrespect and violating the yakuza code.

Ooba finds Danno coming out of a meeting with political kingpin Bokudo Kita and shoots him in the shoulder before taking a bullet to the chest.

When the American tourist dies from her wound, Bokudo tells Boss Danno that, to protect his family, he must reconcile with the Tokyo Alliance and support the Japan-U.S. Security Treaty.

Armed with sharp blades, Tsukamoto kills Boss Danno and Chairman Yato, while letting Bokudo live.

Japan Organized Crime Boss was director Kinji Fukasaku's first film about "modern yakuza" after his return to Toei Company, as well as his first with actors Tomisaburō Wakayama and Noboru Ando.

[6] Fuksaku also read Hans Magnus Enzensberger's Politics and Crime, which describes how the state dismantles organizations that it feels are no longer necessary.

[7] Fukusaku biographer Sadao Yamane stated that the Fukasaku film Sympathy for the Underdog, released a short time later in 1971 and that also stars Tsuruta and Ando, was originally developed as a sequel to Japan Organized Crime Boss until the director saw The Battle of Algiers.

[8] Ito also stated that Sympathy for the Underdog started as a sequel to Japan Organized Crime Boss, and called the two "sister films".