Watch Oh Citizens! (1948) Official Trailer

Maruya Ginzo, an antiques enthusiast and a wealthy man, buys an uninhabited island called Namazu-jima, mistaking it for Numazu-jima tea bowls. He is not a man to just give up, so he sets about building an entertainment district there, but the island is inhabited by five castaways, including Kinpachi Mimura. The Ginzo gang try to entangle Kinpachi and drive them out, and the slapstick drama is caused by the island's inhabitants.