Chikage Oogi

An engineer from Tokyo arrives on a drought-ridden tropical island to drill a well to power a nearby sugar mill. He meets the inbred Futori family, hated by the locals for breaking religious customs.

Chuji and his family become the primary target of gangs in Nikko headed by Hasshu marshal Nakayama and boss Sukegoro Iioka. Chuji is then aided by boss Shigezo Sasagawa, Ishimatsu, and a few young yakuza.