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.
| Movie | Mirage Queen's Elegant Vacations | Zukia (Voice) | 2025-05-23 |
| Series | Train to the End of the World | Jizou (voice) | 2024-04-01 |
| Series | Bleach: Thousand-Year Blood War | Hirako Shinji | 2022-10-11 |
| Series | Hetalia: World Stars | (voice) | 2021-04-01 |
| Series | The Vampire Dies in No Time | Unknown | 2021-10-04 |
| Series | Mashin Sentai Kiramager | Marshmallow Jamen (voice) | 2020-03-08 |
| Series | SAINT SEIYA: Knights of the Zodiac | Hydra Ichi (voice) | 2019-07-19 |
| Movie | The Prince of Tennis: Best Games!! Tezuka vs Atobe | 2018-08-24 | |
| Movie | One Piece Episode of East Blue | Chew (voice) | 2017-08-26 |
| Movie | One Piece Film: GOLD | Spandam (voice) | 2016-07-23 |
| Movie | PERSONA3 THE MOVIE #4 Winter of Rebirth | Jin Shirato (voice) | 2016-01-23 |
| Movie | GANTZ:O | Susumu Kimura (voice) | 2016-10-14 |
| Movie | PERSONA3 THE MOVIE #3 Falling Down | Jin Shirato (voice) | 2015-04-04 |
| Movie | Ressha Sentai ToQger vs. Kyoryuger: The Movie | Clock Shadow (Voice) | 2015-01-17 |
| Series | One-Punch Man | Pri-Pri-Prisoner (voice) | 2015-10-05 |
| Movie | PERSONA3 THE MOVIE #2 Midsummer Knight's Dream | Jin Shirato (voice) | 2014-06-07 |
| Series | New Prince of Tennis OVA vs. Genius10 | Takeshi Momoshiro (voice) | 2014-10-29 |
| Series | The Prince of Tennis II | Takeshi Momoshiro (voice) | 2012-01-04 |
| Series | Saint Seiya Omega | Hydra Ichi (voice) | 2012-04-01 |
| Movie | 009 Re:Cyborg | Great Britain / Cyborg 007 (voice) | 2012-10-27 |
| Movie | One Piece Episode of Nami: Tears of a Navigator and the Bonds of Friends | Chew (voice) | 2012-08-25 |
| Series | Twin Angel: Twinkle Paradise | アレキサンダー | 2011-07-05 |
| Series | Toriko | Teppei (voice) | 2011-04-03 |
| Series | You're Being Summoned, Azazel-san | Azazel (voice) | 2011-04-08 |
| Series | THE iDOLM@STER | Oil Baron (voice) | 2011-07-08 |
| Movie | The Prince of Tennis: Showdown in England's Tennis Fortress | Takeshi Momoshiro | 2011-09-03 |
| Series | Tales of Gekijou | Zelos Wilder | 2011-12-18 |
| Series | Horizon in the Middle of Nowhere | 2011-10-01 | |
| Movie | Welcome to the Space Show | Bogner (voice) | 2010-02-18 |
| Movie | Quiz Magic Academy: The Original Animation 2 | Taiga (voice) | 2010-02-11 |
| Movie | Trigun: Badlands Rumble | Vash The Stampede | 2010-04-24 |
| Movie | Hetalia: Axis Powers: Paint It, White! | France (voice) | 2010-06-05 |
| Movie | Book Girl | Konoha's Father (voice) | 2010-05-01 |
| Series | Working with Voice! | Shigekazu Sakanami | 2010-11-17 |
| Series | Eden of the East | Director Honda (voice) | 2009-04-09 |
| Series | Hetalia | France | 2009-01-24 |
| Movie | Gurren Lagann the Movie: The Lights in the Sky Are Stars | Leeron Littner (voice) | 2009-04-25 |
| Series | The Prince of Tennis: Another Story - Messages From Past and Future | Takeshi Momoshiro (voice) | 2009-05-26 |
| Series | Neo Angelique Abyss | Jade | 2008-04-06 |
| Movie | Gurren Lagann The Movie: Childhood's End | Leeron Littner (voice) | 2008-09-06 |
| Movie | Tales of Symphonia The Animation: Kaette Kita Kratos-sensei no Private Lesson | 2008-09-26 | |
| Series | Lovely★Complex | Fukagawa Haruka (voice) | 2007-04-07 |
| Series | Gurren Lagann | Leeron Littner (voice) | 2007-04-01 |
| Series | Tales of Symphonia: The Animation | Zelos Wilder (voice) | 2007-06-08 |
| Movie | Genesis of Aquarion: Wings of Genesis | Pierre Vieira (voice) | 2007-09-21 |
| Series | Moetan | Ah-kun (voice) | 2007-07-09 |
| Series | Kaiji | Ota (voice) | 2007-10-03 |
| Series | Baccano! | Isaac Dian (voice) | 2007-07-27 |
| Series | Yomigaeru Sora – Rescue Wings | Daigo Nihonmatsu | 2006-01-09 |
| Series | Madan Senki Ryukendo | Zanryujin (voice) | 2006-01-08 |
| Series | Ayakashi: Samurai Horror Tales | Kikimaru (voice) | 2006-01-13 |
| Series | The Prince of Tennis: The National Tournament | 桃城武 | 2006-03-24 |
| Series | Kanon | Evil scientist (movie) (voice) | 2006-10-06 |
| Series | MÄR: Märchen Awakens Romance | Nanashi | 2005-04-03 |
| Series | Aquarion | Pierre Vieira (voice) | 2005-04-05 |
| Series | Bobobo-bo Bo-bobo | Don Patch (voice) | 2005-10-01 |
| Series | Hell Girl | Unknown | 2005-10-04 |
| Movie | Saint Seiya Heaven Chapter: Overture | Hydra Ichi (voice) | 2004-02-14 |
| Series | Bleach | Shinji Hirako (voice) | 2004-10-05 |
| Series | Burst Angel | Azuma Iriki | 2004-04-06 |
| Movie | Fighting Spirit: Champion Road | Takeshi Sendo (voice) | 2003-06-25 |
| Series | Requiem from the Darkness | Fushimiya (voice) | 2003-10-03 |
| Series | Daigunder | Dorimogu | 2002-04-05 |
| Movie | Kinnikuman II Sei: Muscle Ninjin Soudatsu! Choujin Daisensou | 2002-07-20 | |
| Series | Ultimate Muscle: The Kinnikuman Legacy | Mantaro Muscle | 2002-01-09 |
| Series | Saint Seiya: The Hades Chapter | Algol (voice) | 2002-11-09 |
| Movie | Millennium Actress | Kyouji Ida (voice) | 2002-09-14 |
| Movie | The Prince of Tennis: A Day on Survival Mountain | Takeshi Momoshiro (voice) | 2002-12-12 |
| Series | The SoulTaker | 2001-04-04 | |
| Series | Angelic Layer | Ichiro Mihara (voice) | 2001-04-01 |
| Series | The Prince of Tennis | Unknown | 2001-10-10 |
| Movie | Kinnikuman II | 2001-07-14 | |
| Movie | Cardcaptor Sakura: The Sealed Card | Kerberos (voice) | 2000-07-15 |
| Series | Fighting Spirit | Takeshi Sendo (voice) | 2000-10-03 |
| Series | Pet Shop of Horrors | Leon Orcot (voice) | 1999-03-01 |
| Movie | Power Stone: Vol. 6: The Last Battlefield | 1999-01-01 | |
| Series | Kamikaze Kaitou Jeanne | Kaiki Nagoya | 1999-02-13 |
| Series | Magic User's Club! | Takeo Takakura (voice) | 1999-07-07 |
| Series | Power Stone | 1999-04-03 | |
| Series | One Piece | Sham (voice) | 1999-10-20 |
| Series | Omishi Magical Theater Risky Safety | Moe's father | 1999-10-05 |
| Movie | Magic User's Club! vs. Shamanic Princess | Takeo Takakura (voice) | 1998-01-01 |
| Series | TRIGUN | Vash the Stampede (voice) | 1998-04-02 |
| Series | Cardcaptor Sakura | Kerberos(big) (voice) | 1998-04-07 |
| Series | Momoiro Sisters | (voice) | 1998-08-25 |
| Series | AIKa | Michikusa Shuntarou (voice) | 1997-04-25 |
| Series | Master of Mosquiton '99 | Unknown | 1997-09-30 |
| Series | Twin Signal | A Suke (voice) | 1996-09-21 |
| Movie | Panzer Dragoon | Kyle | 1996-10-26 |
| Series | Maps | Calion (voice) | 1994-07-08 |
| Movie | Gatchaman OVA | Ken Washio the Eagle (G-1) | 1994-10-01 |
| Series | Gatchaman | Ken Washio (voice) | 1994-09-30 |
| Movie | Kamen Rider SD: Strange?! Kumo Otoko | Skyrider (voice) | 1993-01-24 |
| Series | Sailor Moon | Jadeite (voice) | 1992-03-07 |
| Movie | Rokudenashi BLUES | Katsuji Yamashita (voice) | 1992-07-11 |
| Movie | Candy Candy: The Movie | Cornwell, Alistair | 1992-04-25 |
| Movie | Capricorn | Jill (voice) | 1991-04-05 |
| Movie | Super Real Mahjong: Mahjong Battle Scramble | Ryu (voice) | 1990-12-21 |
| Series | Be-Bop High School | Hiroshi | 1990-01-26 |
| Movie | Nineteen 19 | Kazushi Kubota (voice) | 1990-07-27 |
| Movie | Maps: Legendary Space Wanderer | Calion (voice) | 1987-07-14 |
| Movie | Delpower X Bakuhatsu Miracle Genki! | Horie | 1986-12-21 |