Bakuchi-uchi: Inochi-huda (1971)

Seijiro and Shizue meet in Niigata and fall in love. Seijiro has to go back to Tokyo soon after, and they promise each other to meet again a year later. However, Seijiro gets jailed for five years. Unable to find him, Shizue gets married to a yakuza boss who can help her family business.