Kōichi Yamadera
He was cast in 1989 until 2008 in Rumiko Takahashi's "Ranma ½" as Happosai, the founder and grandmaster of Musabetsu Kakutō Ryū. He often alternates between his role as a villainous grandmaster to one as a lighthearted pervert, Alongside co-stars Kappei Yamaguchi and Megumi Hayashibara (Ranma Saotome), Kenichi Ogata (Genma), Masako Ikeda (Nodoka), Noriko Hidaka (Akane Tendo), Aso (Cologne), Hirotaka Suzuoki and Kōji Tsujitani (Tatewaki Kuno), Kōichi Yamadera (Ryoga Hibiki) and Hiromi Tsuru (Ukyo Kuonji).