Which Kurosawa film features a corporate revenge plot led by Koichi Nishi?

The Kurosawa film featuring a corporate revenge plot led by Koichi Nishi is The Bad Sleep Well.

Released in 1960, the film stars Toshiro Mifune as Nishi, who marries the daughter of a powerful corporate vice president to infiltrate the company. His real identity is Kazuo Nishi, the illegitimate son of an employee whose death was covered up by the corrupt organization. He seeks evidence and allies while manipulating the executives responsible.

The film is a modernized adaptation of themes from Shakespeare's Hamlet, especially concealed identity, revenge, corruption, and a son pursuing justice for his father's death. Kurosawa relocates those concerns to postwar Japan's business world, where government contracts and corporate influence blur ethical boundaries.

The Bad Sleep Well was the first film produced through Kurosawa's own independent production company. Its long wedding-reception opening introduces the corruption through reporters and police investigations before the personal revenge story takes over. The bleak ending underlines how easily institutions can suppress truth even when wrongdoing is exposed.