Kohsuke Toriumi (鳥海 浩輔, Toriumi Kōsuke, born May 16, 1973 in Chigasaki, Kanagawa Prefecture) is a Japanese voice actor and narrator affiliated with Arts Vision. Having received formal training at Yoyogi Animation Gakuin and Japan Narration Acting Institute, he made his debut in Remi, Nobody's Girl. He and former classmate Kenichi Suzumura are members of Nazo no Shin Unit STA☆MEN, an all-male voice unit they formed alongside their colleagues in 2002. His hobbies are cooking, music, and fashion. A few of his fan nicknames are Tori-chan (鳥ちゃん), Tori-san (鳥さん), or ToriKou (とりこう).