Frog), Kai Shiden (Mobile Suit Gundam), Shin (Fist of the North Star), Asuma Shinohara (Mobile Police Patlabor), Piccolo (Dragon Ball), Ataru Moroboshi (Urusei Yatsura), Portgas D. Ace (One Piece), Jann Lee (Dead or Alive) and Misao Yamamura (Detective Conan).

Toshio is a veteran who has played a variety of characters from comedians like Ataru of Urusei Yatsura and Inumaru of Gosenzo-sama Banbanzai!, to calm, serious ones like Shin from Fist of the North Star and Piccolo of the Dragon Ball series.

Furthermore, Toshio is capable of performing with a "boy voice" and has played noble hot-blooded heroes such as Prince Mito of Saikyō Robo Daiōja [ja] and Kento Tate of Future Robo Daltanius.

He performed in the band Slapstick (スラップスティック) with Tōru Furuya, Kazuyuki Sogabe, Yūji Mitsuya and Akio Nojima.

In 2007, Slapstick got together to pay tribute to former band members, Hirotaka Suzuoki and Kazuyuki Sogabe (guitar).