子安 武人

Koyasu Takehito, born May 5, 1967 in Yokohama, Kanagawa, Japan, is a very popular and prolific voice actor.

According to the Anime News Network, as of December 2008, Koyasu is the most prolific voice actor in Japan with voice acting roles in 365 anime series.

He is also part of the voice actor quartet Weiss consisting of Weiss Kreuz voice castmates Miki Shin'ichirou, Seki Tomokazu and Yuuki Hiro. He used to work for Production Baobab but is now the head of T's Factory, a seiyuu company he founded in 1998.