Inagaki Seiya is a Japanese actor. Though his filmography is comparatively short, he's been in notable TV dramas such as Samurai High School, Tumbling, and Arakawa Under the Bridge. Inagaki's headed by W-UP Entertainment.
In TeniMyu he plays the role of Inui Sadaharu as a part of the seventh-generation Seigaku cast, the second cast of the second season. This production is Seiya's professional theater debut.