ひとり狼 (1968)

Isazo is a traveling gambler and living legend in the world of yakuza, known for his swordsmanship and bravery, his impeccable manners, and his brilliant talent in gambling. One late fall at an inn in Kiso Fukushima, Isazo befriends a young boy whose mother turns out to be his old love Yoshino, with whom he was not unable to consummate a marriage due to the class differences between them.