Rikiya Koyama is a Japanese actor and voice actor who is a member of Haiyuza Theatre Company. He has done popular voicing roles in Hajime no Ippo, Utawarerumono and Kamen no Maid Guy. He is also known by the nicknames "Rikki" and "Riki-chan". Koyama become well known for voicing Yamato from Naruto, Kogoro Mouri from Case Closed and Coyote Starrk from Bleach.
From Wikipedia
Rikiya Koyama (小山 力也, Koyama Rikiya; born December 18, 1963) is a Japanese actor, voice actor and narrator currently affiliated with Haiyuza Theatre Company. He has done popular voicing roles in Hajime no Ippo, Utawarerumono, Kamen no Maid Guy and Yakuza, and has become well known for voicing Yamato in Naruto Shippuden, Ging Freecss in Hunter X Hunter and Kogoro Mouri (second voice, 2009–present) in Case Closed. In addition, he is known for voicing rather tall or massive inhuman villains like Coyote Starrk in Bleach, Fukuro in Fairy Tail and Deep Sea King in One Punch Man. He is the official dub-over artist of George Clooney, Kiefer Sutherland, Dwayne Johnson and Ma Dong-seok. In addition, he dubbed many roles of Denzel Washington, Keanu Reeves and Guy Pearce.