Zatoichi at Large (1972)

Original title: 座頭市御用旅

Blind masseur and master swordsman Zatoichi finds a robbed and fatally wounded pregnant woman, whose baby he delivers before she dies. He takes the baby in search of its father and finds the child's aunt, who is about to be forced into prostitution for want of a payment the dead mother was bringing. Zatoichi determines to save the woman from her cruel fate.