Koichi Yamadera, Ryōji Kaji's seiyu

Kōichi Yamadera (山寺 宏一 Yamadera Kōichi, born June 17, 1961) is a Japanese voice actor, actor, tarento, narrator, master of ceremonies and impressionist from Shiogama, Miyagi Prefecture. He graduated from Tohoku Gakuin University's economics school, and is currently affiliated with Across Entertainment. Before that, he was affiliated with the Tokyo Actor's Consumer's Cooperative Society.

His nickname is Yama-chan (山ちゃん Yama-chan). As a radio personality, he is known as Bazooka Yamadera (バズーカ山寺 Bazūka Yamadera) among other things. He is best known for his roles in Ninja Scroll (as Jūbei Kibagami), Aladdin: Japanese Version (as The Genie), Cowboy Bebop (as Spike Spiegel) and (Ein), Ghost in the Shell (as Togusa), Neon Genesis Evangelion (as Ryōji Kaji), Soreike! Anpanman (as Cheese), Ranma ½ (as Ryōga Hibiki/P-chan and the Jusenkyō Guide). He is known for voicing Jim Carrey and Eddie Murphy in the Japanese language releases of their respective films.

A selection of other characters voiced by Koichi Yamadera

  • Bubblegum Crisis (OVA) as Fargo
  • Cowboy Beebop as Spike Spiegel
  • Ghost in the Shell (movie & TV series) as Togusa
  • Guy, Double Target as Guy
  • Lupin III: Crisis in Tokyo as Michael Suzuki
  • Mario Kart Arcade GP 2 - Color Commentator
  • Mermaid Forest and Mermaid's Scar as Yuta
  • Mickey Mouse franchise as Donald Duck (only on the Japanese Dub)
  • Milennium Actress as Key Man
  • Ninja Scroll (movie) as Jubei Kibagami
  • Paprika (movie) as Doctor Morio Osanai
  • Ranma 1/2 as Ryouga Hibiki/P-chan and Jusenkyo Guide

and many more...


  • In addition to anime work, Yamadera's output included dubbing numerous Western films and TV shows, as well as Disney features, in his long career.
  • Is a host of an early-morning television show.
  • Yamadera is extremely versatile, be it heroes or villains, and even going as far as voicing as a woman .

External links

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