born October 7, 1984 in Hokkaidō) is a Japanese talent artist part of Johnny's Jr. under the supervision of Johnny & Associates.

His family consists of a father, a mother named Hiromi, a younger brother named Ryuusei, and a dog named JAM. His father wanted to name him Ikuta Tamegorou, but his mother changed it to Toma because it was easier to pronounce. He used to be called Toma, Touma, or Toma-chan by his family and friends. Younger juniors in the agency called him Toma-san and that morphed to Tomasu. This name was his “trademark” while he hosted a segment named Meitantei Tomasu in the Shounen Club program.

TV DramA
* VOICE ~Inochi Naki Mono no Koe~ (12 January - ? March 2009) as Ryousuke Ishizue
* Maou (July - September 2008) as Naoto Serizawa
* Hanazakari No Kimitachi E ~Ikemen Paradise~ - SP (October 2008) as Shuuichi Nakatsu
* Honey & Clover (January - March 2008) as Yūta Takemoto
* Hanazakari No Kimitachi E ~Ikemen Paradise~ (July 2007 - September 2007) as Shuuichi Nakatsu
* Hana Yori Dango II (Returns) (January 2007) as Junpei Oribe (Episode 1)
* Akihabara@DEEP (June - August 2006) as Box
* Asuka E, Soshite Mada Minu Ko E (October 2005)
* Dekabeya, Police Story
* Gekidan Engimono (Otoko no Yume) (2006)
* Kinou Wa Tomo Kyou no Teki (5 January - 9 February 2004)
* Hito Ni Yasashiku (Be Nice to People)(2002)(Episode 5)
* Neverland (2001)
* Bouken Kazoku
* Engimono – America (2002)
* Aguri (1997)
* Kowai No Nichiyoubi
* Shijou Saiyaku no Date (Worst Date) – Episode Chocolate Valentine
* Love & Peace
* Nekketsu Renaidou
* Kinyou Jidai Geki
* Gekidan Engimono – Nemureru Mori No Shitai
* Psycho-meter EIJI2 (Episode 5) (1999)
* J-Ke No Hanran
* Tuesday Suspense Drama
* Gozen 3Ji no Rooster