Onosaka Masaya roles
Anime
Masaya has done the following roles in anime.
| Aika [1997-1999] | ? |
| Angelic Layer [2001] | Mihara Ichirou |
| Bakuretsu Tenshi | IIki |
| Be-Bop High school | Katoh Hiroshi |
| Capricorn | Jill |
| Card Captor Sakura | Kerberos (big) |
| Gatchaman '94 | G-1 Ken |
| Ge Ge Ge no Kitarou | crow tengu B |
| Gun X Sword | Captain Kaiji |
| Hajime no Ippo | Sendo Takeshi |
| Hoshikuzu Paradise [1991] | Yuzuru |
| Kaitou Tenshi Twin Angel (TV) [2011] | Alexander |
| Kamikaze Kaitou Jeanne [1999-2000] {Episode 22} | Kaisei |
| Kidou Tenshi Angelic Layer [2001] | Mihara Ichirou |
| Kinnikuman II Sei | Kinniku Mantarou |
| Koume-chan ga Iku! | Nakatani |
| Magical Taruruuto-kun [1990-1992] | Ryuu Writer |
| Mahou Tsukai Tai! | Takakura Takeo |
| Maps [1987] [debut] | Karion |
| Master Mosquiton '99 {Episode 11} | Soron |
| Meitantei Conan (Detective Conan) {Episode 55} | Kobayashi |
| Millenium Actress | Ida Kyouji |
| Night Head Genesis | Futami Yoshiki |
| Nineteen [1990] | Kubota Kazushi |
| Nurse Witch Komugi-chan Majikarte | Shiro |
| Omakase Scrappers | Ten Q |
| Omakase Scrappers | Narimasu |
| One Piece [1999-] | Chuu |
| One Piece [1999-] {Episode 11-14} | Shamu |
| Pet Shop of Horror | Leon Alcott |
| Pocket Monsters {Episode 13} | Masaki |
| Risky Safety | Moe's father |
| Sailor Moon | Jadeite |
| Sailor Moon {Episode 92} | Kameda |
| Slam Dunk | Aida Hikoichi |
| Slam Dunk | Yasuda Yasuharu |
| Slam Dunk | Anda |
| The Soul Taker: Tamashiigari | Mibu Shiro |
| Spiral -Suiri no kizuna- | ? |
| Tennis no Oujisama | Momoshiro Takeshi |
| Trigun [1998] | Vash The Stampede |
| Trigun: Badlands Rumble [2010] | Vash The Stampede |
| Tsuyoshi Shikkari Shinasai | Ikawa Tsuyoshi |
| Utsunomiko | Misc. males voices |
| Wolf's Rain | Ihk |
| Youkai Ningen Vem [2006] | Kudou |
Games
Masaya has done the following roles in games.
| Animal Magnetism [Win95, Win98] | Leon |
| BLEACH The 3rd Phantom [NDS] | ? |
| Emerald Dragon [PC Engine] | Carswer |
| Gungrave [PlayStation 2] | Balladbird Lee |
| hack//Akushou Hen'i Vol.2 (.hack) [PlayStation 2] | Piroshi |
| hack//Shinshoku Osen Vol.3 (.hack) [PlayStation 2] | Piroshi |
| Jo Jo no Kimyouna Bouken: Phantom Blood [PlayStation 2] | Robert |
| Love Kon -Panchi DE Konto- [PlayStation 2] | Suzuki Ryouji |
| Quiz Magic Academy 2 [Arcade] | Taiga |
| Quiz Magic Academy 3 [Arcade] | Taiga |
| Senkutsu Katsuryuu Taisen Chaos Seed [Sega Saturn] | ? |
| Shin Sangoku Musou [Playstation 2, PSP] | Chou Un |
| Shin Sangoku Musou [Playstation 2, PSP] | Sho Katsu Ryou (Zhu Ge Liang) |
| Tales of Fandom Vol 2 [PlayStation 2] | Zeros |
| Tales of Symphonia: Ratatosuku no kishi [Wii] | Zellos |
| Tsuyoshi Shikkari Shinasai Taisen Puzzle-dama [Super Famicom] | Ikawa Tsuyoshi |
Drama
Masaya has done the following roles in audio drama.
| Beast of East [CD] | ? |
| Cobalt Tokimeki Drama CD Remix [CD] | ? |
| D.N.Angel Wink [CD] | ? |
| DN Angel [CD] | Dark Mousy |
| Emerald Dragon [CD] | Carswer |
| Lunatic Dawn III [CD] | Akugyaku no Lunatic |
| Lunatic Dawn III [CD] | narrator |
| Momo Iro Sisters Office Version [CD] | Tokawa Keisuke |
| Motto! Tokimeki Memorial [CD] | Takami Naoto |
| Sentimental Graffiti [CD] {Omoide no School Days} | Kaho's teacher |
| Tokimeki Memorial Love Song wo Kimi ni [CD] | Takami Naoto |
| Tokimeki Memorial Love song wo Kimi ni [CD] | Takami Naoto |
| Tokimeki Memorial Saigo no Natsuyasumi [CD] | Takami Naoto |
| Trigun -The Second Donut Happy Pack- [CD] | Vash The Stampede |