
Quick answer — Keisuke Itagaki worked on Baki Hanma Season 2 (Original Creator), Baki Hanma (Original Creator), BAKI-DOU: The Invincible Samurai (Original Creator) and 6 more anime.
Keisuke Itagaki worked on Baki Hanma Season 2 (Original Creator), Baki Hanma (Original Creator), BAKI-DOU: The Invincible Samurai (Original Creator), Baki: The Great Raitai Tournament Saga (Original Creator), BAKI (Original Creator), Baki the Grappler (Original Creator), Grappler Baki Maximum Tournament (Original Creator), Grappler Baki: The Ultimate Fighter (Original Creator) and 1 more.