Masaya Onosaka is a Japanese voice actor who works for Aoni Production. In 2010 he won the "Best Personality" Seiyu Award. Onosaka was born in Osaka. He is known for his Kansai accent in some of his roles.
- Title: Masaya Onosaka
- Popularity: 14.004
- Known For: Acting
- Birthday: 1964-10-13
- Place of Birth: Osaka, Japan
- Homepage: http://www.aoni.co.jp/search/onosaka-masaya.html
- Also Known As: 小坂正也, Minagawa Junko, 小野坂昌也