1954 Japanese movie

A samurai is struggling to make ends meet at the end of the Edo period. He has students and, among other things, teaches them about the evils of the government. A member of the yakuza thugs has fallen in love with the samurai's daughter and conspires to report the father to the authorities in order to snatch the girl. The samurai's daughter has a boyfriend who hides the father and daughter from the thug.