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Rikiya Koyama (小山 力也 Koyama Rikiya, born December 18, 1963 in Kyoto ) is a Japanese actor and voice actor who is a member of Haiyuza Theatre Company. He is also known by the nicknames "Rikki" and "Riki-chan". Koyama is the voice of Cumber in Super Dragon Ball Heroes. He also has done popular voicing roles in anime such as Hajime no Ippo, Utawarerumono, and Kamen no Maid Guy.


  • Naruto - Yamato
  • Bleach - Coyote Starrk
  • Case Closed - Kogoro Mouri
  • Hunter x Hunter - Ging Freecss
  • One-Punch Man - Sea King
  • One Piece - Galley, Kyros (until 2016)
  • Future Card Buddyfight - Demon Lord Dragon, Batzz
  • Marvel Anime - Wolverine/Logan

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