Showdown in Blood (1957)

Original title: 血まみれの決闘

Hayata and his best friend Ushijima came to Tokyo to become champions. Hayata repeatedly sought to join Tamura's boxing club, but Tamura fell in love with Ushijima's punch. Then Hayata decides to become Ushijima's manager and make good money on his friend's talent. Ushijima himself is a peaceful, kind guy who doesn't really like boxing, but under the wise guidance of Hayata, he starts to defeat one opponent after another...