Its name comes from the Aizu region, "Kotetsu", a type of Japanese sword, and the suffix "-kai", or society.

Its chairman at the time, Tokutaro Takayama, campaigned publicly against the new laws, and the group launched a lawsuit challenging their constitutionality.

In September 1995 the Kyoto District Court threw out the lawsuit.

In October 2005, the group allied with the Sixth Yamaguchi-gumi, Japan's largest yakuza clan now led by Kenichi Shinoda (Oyabun) and his second-in-command (Wakagashira) Kiyoshi Takayama.

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