He is a voice actor and actor affiliated with Across Entertainment.
[Profle](http://across-ent.com/talent/men/tsuyoshi_koyama.html) | [Blog](https://blog.goo.ne.jp/koyamap) | [Twitter](https://twitter.com/_higetter_) | [Anison](http://anison.info/data/person/22799.html) | [Wiki (en)](https://en.wikipedia.org/wiki/Tsuyoshi_Koyama) | [Wiki (jp)](https://ja.wikipedia.org/wiki/%E5%B0%8F%E5%B1%B1%E5%89%9B%E5%BF%97)
__Non-Anime Roles:__
- Kamen Rider Odin - Kamen Rider Ryuuki (TV Series)
- Visors - Kamen Rider Ryuuki (TV Series)
