
Quick answer — Kousuke Okano voices Noboru Yoshikawa in GTO: Great Teacher Onizuka, Daiki Asuka in Mysterious Thief Saint Tail, Yashima in Kamichu! and 16 more characters.
Kousuke Okano voices Noboru Yoshikawa (GTO: Great Teacher Onizuka), Daiki Asuka (Mysterious Thief Saint Tail), Yashima (Kamichu!), Recca Hanabishi (Flame of Recca), Mahiro Atori (Hiiro no Kakera: The Tamayori Princess Saga 2), Kenta Nakamura (Initial D 1st Stage), Russell Tringham (Fullmetal Alchemist), Aozaru (The Twelve Kingdoms) and 11 more.
Noboru Yoshikawa is voiced in Japanese by Kousuke Okano.