Yamamoto made his acting debut on Kamen Rider Kabuto back in 2006 as Tsurugi Kamishiro/Kamen Rider Sasword, and since then, starred in various movies and TV shows, most notably the 2007 Hana Kimi drama's Taiki Kayashima, Ouran High School Host Club's Tamaki Suoh, Sadako 3D's Seiji Kashiwada, and Great Teacher Onizuka's Toshiyuki Saejima.
[Source: J-CAST via Daisuki Toku]