This article is about a/an suit actor in the Kamen Rider Series.

Masashi Shirai (白井 雅士 Shirai Masashi) played Me-Giiga-Gi in Kamen Rider Kuuga. He later served as suit actor to Another Agito in Kamen Rider Agito and Kamen Rider Impaler in Kamen Rider Ryuki.

He later made an out of suit appearance as a riot police officer in episode 20 and a victim in episode 45 of Kamen Rider Agito, one of Otaki's men in episode 26 of Kamen Rider Ryuki, a Smart Brain Employee/Barnacle Orphnoch in episodes 37 and 38 of Kamen Rider 555, a Neo Shade member in the Global Freeze event depicted in episode 1 of Kamen Rider Drive and Episode 0: Countdown to Global Freeze, and as the Bomb Squad Commander in episode 23.