Masaya Onosaka is a Japanese voice actor and singer from Osaka, Japan, born on October 13, 1964. He built his career in the seiyuu world, a field that often connects anime voice acting with drama CDs, games, and character-related music, and his work reflects that cross-media tradition.
For anime audiences, Onosaka’s name is useful to know because seiyuu performances can shape how a series is remembered, and his credits place him within the broader network of Japanese cast and music listings searched by fans of anime and voice acting. As a singer, he also belongs to the seiyuu-singer tradition, where performers extend their character work into music-related projects.
His activity has continued beyond animation. In January 2026, he appeared in the special drama 119 as one of the voices of callers, and in June 2026 he was announced for Jisoku 246’s independent memorial performance Labiton alongside Ryotaro Okiayu and others. These credits show an artist whose career spans voice acting, stage-related work, and music-linked appearances across Japanese media.
