Koutaro Nishiyama is an actor of 32 (11 octobre 1991). Koutaro Nishiyama has appeared in 23 shows and 4 movies. A performance to be found in the role of Koji Tatsuishi (voice) in the series My Happy Marriage. In the cinema, in the role of Kazuhito Narita (voice) in the feature film 劇場版ハイキュー!! ゴミ捨て場の決戦.