Profile
* Name: 小山慶一郎 (こやま けいいちろう)
* Name (romaji): Koyama Keiichiro
* Nicknames: Koyama, Keii or Kei-chan, Koyamacchi
* Profession: Actor and singer
* Birthdate: 1984-May-01
* Birthplace: Tokyo, Japan
* Height: 177cm *
* Weight: 59kg
* Star sign: Taurus
* Blood type: O
* Family: Older sister
* Talent agency: Johnny's Entertainment
TV Shows
* 0 Goshitsu no Kyaku (Fuji TV, 2009)
* Loss Time Life as Tsunami Kota (Fuji TV, 2008, Story 2)
* Yukan Club as Kariho Yuya (NTV, 2007, ep6)
* Hanayome wa Yakudoshi as Azuchi Jiro (TBS, 2006)
* Kurosagi as Tanabe Satoshi (TBS, 2006, ep2)
* Ns' Aoi as Kitazawa Takeshi (Fuji TV, 2006)
* Gekidan Engimono Unlucky Days - Natsume no Mousou as Sanada (Fuji TV, 2004)
* Kanojo ga Shinjyatta (NTV, 2004)
Endorsements
* RUSS-K
* LAWSON (2008)
Trivia
* Specialty: Baseball
* School: Meiji University major in Asian History
* JPop Group: BAD, J-support, K.K.Kity, NEWS
* Name: 小山慶一郎 (こやま けいいちろう)
* Name (romaji): Koyama Keiichiro
* Nicknames: Koyama, Keii or Kei-chan, Koyamacchi
* Profession: Actor and singer
* Birthdate: 1984-May-01
* Birthplace: Tokyo, Japan
* Height: 177cm *
* Weight: 59kg
* Star sign: Taurus
* Blood type: O
* Family: Older sister
* Talent agency: Johnny's Entertainment
TV Shows
* 0 Goshitsu no Kyaku (Fuji TV, 2009)
* Loss Time Life as Tsunami Kota (Fuji TV, 2008, Story 2)
* Yukan Club as Kariho Yuya (NTV, 2007, ep6)
* Hanayome wa Yakudoshi as Azuchi Jiro (TBS, 2006)
* Kurosagi as Tanabe Satoshi (TBS, 2006, ep2)
* Ns' Aoi as Kitazawa Takeshi (Fuji TV, 2006)
* Gekidan Engimono Unlucky Days - Natsume no Mousou as Sanada (Fuji TV, 2004)
* Kanojo ga Shinjyatta (NTV, 2004)
Endorsements
* RUSS-K
* LAWSON (2008)
Trivia
* Specialty: Baseball
* School: Meiji University major in Asian History
* JPop Group: BAD, J-support, K.K.Kity, NEWS