Hiroyuki Watanabe is a Japanese actor and director, primarily joining in dramas, of which a handful are tokusatsu series. Recently, he became well-known for his roles as Taiga Saejima in the tokusatsu series GARO (2005-2006), Kamen Rider Gaoh in Kamen Rider Den-O: I'm Born! (2007) and Taiko in Everly (2014).
After graduating from Takushoku University, he made his appearance in several films such as Tōyama no Kin-san (1992), Onihei Hankachō (1994) and Ultraman Gaia (1998).
He got married to Hideko Hara in 1994.