Salaryman Kintarou

Salaryman Kintarou (サラリーマン金太郎) is a Japanese manga series by Hiroshi Motomiya. It has been serialized in Weekly Young Jump since 1994, but has gone through many periods of inactivity. An anime adaptation by JCF Studios premiered from February 18 to March 18, 2001

Plot
Kintarou Yajima was a former Bōsōzoku lead, who decides that its time to "straighten out" and become a "salaryman", after the death of his wife died and to take care of his young son.