Hiyama KoseiActing·2003 (23)·Chiba, Chiba Prefecture, JapanNo biography is available.Known forIMDb0.0The High School HeroesTV show · 2021IMDb0.0Sensei SayounaraTV show · 2024IMDb0.0Bungo Shounen! Johnny's Jrs de Meisaku wo YomitoitaTV show · 2021IMDb0.0Johnny's Jr. Our Survival WarsMovie · 2022Credits4AllMoviesTV showsAll departments▼2024Sensei SayounaraTV showas Akagi Yu · 10 episodes2022Johnny's Jr. Our Survival WarsMovieas Washio2021The High School HeroesTV showas Kenji Sakaki · 3 episodes2021Bungo Shounen! Johnny's Jrs de Meisaku wo YomitoitaTV showas Kei · 10 episodes