He is the leader out of a small yakuza group that we see at the start of the series.

Pilot: We see him with his yakuza group trying to get their money back from Sachi when Joe then beats them all up and takes Hirata down with a body blow.
Anime: We see him appear with a bunch of yakuza members at a playground after Joe had beaten up some of his men. Joe then fights them all.
Manga: He appears in the group of 3 yakuza members that we see at the very start of the manga.

He looks a bit different in each version:

• In the pilot, he appears with a hat, a jacket over his shoulders, and some kind of ''beating'' stick.
• In the anime, he's wearing a very yellow jacket, a hat, glasses, and a cigarette in his mouth.
• In the manga, he appears as a medium-sized guy with sunglasses and something in his mouth.