Minami no Teiō.

難波金融伝・ミナミの帝王

Minami no Teiō (ミナミの帝王; lit. 'King of Minami') is a Japanese manga series written by Dai Tennōji and illustrated by Rikiya Gō. It has been serialized in Nihon Bungeisha's Weekly Manga Goraku from 1992 to 2026. It is one of the longest manga series, with 188 volumes published.