Hiyama Kosei
- Acting
- October 2, 2003 · Chiba, Chiba Prefecture, Japan
Known for
Filmography
- Sensei Sayounara · Akagi Yu
- Johnny's Jr. Our Survival Wars · Washio
- The High School Heroes · Kenji Sakaki
- Bungo Shounen! Johnny's Jrs de Meisaku wo Yomitoita · Kei