Mob(1984)

Mob

Following the tragic and dishonorable murder of their father, the Nagase brothers are distraught. Shinpachi, the eldest, is more determined than ever to make the culprits pay, and embarks on a bloody crusade against the yakuza in the Kansai region. Ginpachi, disapproving of his brother's actions, prefers to stay out of the fray.

(Source: Black Box Editions, translated)