Ryota Osaka is a Japanese voice actor from Tokushima Prefecture who is affiliated with Early Wing. He received Best Male Newcomer at 9th Seiyu Awards in 2015. He also hosts the radio show ŌHana (逢坂市立花江学園 Ōsaka Shiritsu Hanae Gakuen) along with voice actor Natsuki Hanae.
| Series | Yowaki MAX Reijo Nano ni, Ratsuwan Konyakusha-sama no Kake ni Notte Shimatta | Rufus | 2026 |
| Series | A Star Brighter than the Sun | Yushin Izawa (voice) | 2025-10-02 |
| Series | From Old Country Bumpkin to Master Swordsman | Spur (voice) | 2025-04-05 |
| Movie | HAIKYU!! The Dumpster Battle | Keiji Akaashi (voice) | 2024-02-16 |
| Series | The Witch and the Beast | Johan (voice) | 2024-01-12 |
| Series | Code Geass: Rozé of the Recapture | Heath Lott (voice) | 2024-06-21 |
| Series | A Sign of Affection | Kyouya Nagi (voice) | 2024-01-06 |
| Series | A Condition Called Love | Keigo Kurata (voice) | 2024-04-04 |
| Series | Magilumiere Magical Girls Inc. | Kaede Midorikawa (voice) | 2024-10-04 |
| Movie | Kamen Rider Gotchard Final Episode: You and Me, We've Got CHEMY×STORY - Director's Cut Version | The Sun, Apparebushido, Pilets, Stagvine (voice) | 2024-09-15 |
| Series | A Terrified Teacher at Ghoul School! | Haruaki Abe (voice) | 2024-10-08 |
| Movie | Kamen Rider Gotchard: The Future Daybreak | The Sun (voice) | 2024-07-26 |
| Movie | Demon Slayer: Kimetsu no Yaiba - Entertainment District Decisive Battle Arc | Gyutaro (voice) | 2023-03-01 |
| Movie | Demon Slayer: Kimetsu no Yaiba -To the Swordsmith Village- | Gyutaro (voice) | 2023-02-03 |
| Series | Endo and Kobayashi Live! The Latest on Tsundere Villainess Lieselotte | Artur Richter (voice) | 2023-01-07 |
| Series | Ania Kingdom | Eddie (voice) | 2023-04-02 |
| Series | The Tale of Outcasts | Snow (voice) | 2023-01-08 |
| Series | The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Far | Yuya (voice) | 2023-04-03 |
| Series | Berserk of Gluttony | Fate Graphite (voice) | 2023-10-05 |
| Movie | Black Clover: Sword of the Wizard King | Sekke Bronzazza (voice) | 2023-06-16 |
| Series | MF GHOST | Kouki Sawatari (voice) | 2023-10-02 |
| Series | Opus.COLORs | Takise Kyou (voice) | 2023-04-07 |
| Movie | Bubble | Isozaki (voice) | 2022-02-14 |
| Series | Salaryman's Club | Touya Saeki (voice) | 2022-01-30 |
| Series | Engage Kiss | Mikhail Hachisuka (voice) | 2022-07-03 |
| Movie | Toku: Touken Ranbu: Hanamaru ~Setsugetsuka~ Hana no Maki | 2022-07-08 | |
| Series | Love Flops | Asahi Kashiwagi (voice) | 2022-10-12 |
| Movie | Sword Art Online the Movie – Progressive – Scherzo of Deep Night | Joe (voice) | 2022-10-22 |
| Series | Shinobi no Ittoki | Ittoki Sakuraba (voice) | 2022-10-04 |
| Series | Farewell, My Dear Cramer | Kaoru Takei (voice) | 2021-04-04 |
| Series | The Hidden Dungeon Only I Can Enter | Noir (voice) | 2021-01-08 |
| Series | Heaven's Design Team | Yokota (voice) | 2021-01-07 |
| Series | The Saint's Magic Power Is Omnipotent | Oscar Dunckel (voice) | 2021-04-06 |
| Series | Fena: Pirate Princess | Kaede (voice) | 2021-08-15 |
| Series | Tokyo Revengers | Naoto Tachibana (voice) | 2021-04-11 |
| Movie | Farewell, My Dear Cramer: First Touch | Kaoru Takei (voice) | 2021-06-11 |
| Movie | Knights of Sidonia: Love Woven in the Stars | Nagate Tanikaze (voice) | 2021-06-04 |
| Series | Healin' Good Precure | 2020-02-02 | |
| Movie | Gundam Reconguista in G Movie II: Bellri's Fierce Charge | Klim Nick (voice) | 2020-02-21 |
| Series | Shadowverse | Ryoga Jasei (voice) | 2020-04-07 |
| Movie | Pretty Cure Miracle Leap: A Wonderful Day with Everyone | Youta Hiramitsu (voice) | 2020-10-31 |
| Movie | Attack on Titan: Chronicle | Marco Bodt (voice) | 2020-07-17 |
| Series | The Misfit of Demon King Academy | Kanon (voice) | 2020-07-04 |
| Series | We Never Learn: BOKUBEN | Yuiga Nariyuki (voice) | 2019-04-07 |
| Series | Girly Air Force | Kei Narutani (voice) | 2019-01-10 |
| Movie | Kabaneri of the Iron Fortress: The Battle of Unato | Sukari (voice) | 2019-05-10 |
| Series | Grimms Notes: The Animation | Ex (voice) | 2019-01-11 |
| Series | A Certain Scientific Accelerator | Mikihiko Hishigata (voice) | 2019-07-12 |
| Movie | Shinkansen Henkei Robo Shinkalion The Movie: The Marvelous Fast ALFA-X That Comes From the Future | Ryuji Kiyosu (voice) | 2019-12-27 |
| Movie | For Whom the Alchemist Exists | Edgar L. Leonhart (voice) | 2019-06-14 |
| Movie | Gundam Reconguista in G Movie I: Go! Core Fighter | Klim Nick (voice) | 2019-11-29 |
| Series | ORESUKI Are you the only one who loves me? | Tatsuo Shiba (voice) | 2019-10-03 |
| Series | Libra of Nil Admirari | Hisui Hoshikawa | 2018-04-08 |
| Series | Ulysses: Jeanne d'Arc and the Alchemist Knight | Montmorency | 2018-10-07 |
| Movie | The Laws of the Universe: The Age of Reimei | Ray (voice) | 2018-10-12 |
| Series | Akashic Records of Bastard Magic Instructor | Kristoff Fraul | 2017-04-04 |
| Movie | Kuroko's Basketball the Movie: Last Game | Chihiro Mayuzumi (voice) | 2017-03-18 |
| Movie | Ao Oni The Animation | Kouji Manabe | 2017-02-11 |
| Series | Love and Lies | Yukari Nejima | 2017-07-04 |
| Movie | Kabaneri of the Iron Fortress: Life That Burns | Sukari (voice) | 2017-01-07 |
| Series | Netsuzou Trap -NTR- | Takeda (voice) | 2017-07-05 |
| Movie | Pokémon the Movie: I Choose You! | Cross (voice) | 2017-07-15 |
| Movie | Mobile Suit Gundam Thunderbolt: Bandit Flower | 2017-11-18 | |
| Series | Classroom of the Elite | Yosuke Hirata (voice) | 2017-07-12 |
| Series | Tales of Zestiria the X | Mikleo (voice) | 2016-07-10 |
| Movie | PERSONA5 the Animation - THE DAY BREAKERS - | Kazuya Makigami (voice) | 2016-09-03 |
| Series | Kabaneri of the Iron Fortress | Sukari (voice) | 2016-04-08 |
| Series | Undefeated Bahamut Chronicle | Arcadia Fugil | 2016-01-11 |
| Series | Ao Oni The Blue Monster | Hiroshi | 2016-10-03 |
| Series | AOKANA: Four Rhythm Across the Blue | Hinata Masaya (voice) | 2016-01-12 |
| Movie | Code Geass: Akito the Exiled 5: To Beloved Ones | (voice) | 2016-02-06 |
| Series | Monster Hunter Stories: Ride On | Shuval (voice) | 2016-10-02 |
| Movie | Kuroko's Basketball - Movie: Winter Cup - Crossing the Door | Chihiro Mayuzumi (voice) | 2016-12-03 |
| Movie | Kabaneri of the Iron Fortress: Light That Gathers | Sukari (voice) | 2016-12-31 |
| Movie | Koro-sensei Q! | Yuma Isogai | 2016-11-19 |
| Series | Koro Sensei Quest! | Yuma Isogai (voice) | 2016-12-23 |
| Series | Trickster | Kensuke Hanasaki (voice) | 2016-10-04 |
| Series | ALL OUT!! | Mutsumi Hachiooju (voice) | 2016-10-07 |
| Movie | Assassination Classroom the Movie: 365 Days' Time | Yuma Isogai (voice) | 2016-11-19 |
| Series | Yamada-kun and the Seven Witches | Ryū Yamada (voice) | 2015-04-12 |
| Movie | Attack on Titan: Wings of Freedom | Marco Bodt (voice) | 2015-06-27 |
| Series | Takamiya Nasuno Desu! Teekyu Spinoff | Youta Oshimoto (voice) | 2015-04-07 |
| Movie | Knights of Sidonia: The Movie | Nagate Tanikaze (voice) | 2015-03-06 |
| Series | Ushio and Tora | Satoru Moritsuna (voice) | 2015-07-03 |
| Series | Is It Wrong to Try to Pick Up Girls in a Dungeon? | Apollo (voice) | 2015-04-04 |
| Series | Show by Rock!! | Kai (voice) | 2015-04-05 |
| Series | Assassination Classroom | Yuuma Isogai (voice) | 2015-01-10 |
| Series | Attack on Titan: Junior High | Marco Bodt (voice) | 2015-10-04 |
| Movie | Code Geass: Akito the Exiled 4: Memories of Hatred | (voice) | 2015-07-04 |
| Series | Chivalry of a Failed Knight | Ikki Kurogane (voice) | 2015-10-03 |
| Movie | Your Lie in April: Finale Event | Ryōta Watari | 2015-12-23 |
| Series | Snow White with the Red Hair | Zen Wistaria (voice) | 2015-07-07 |
| Movie | Yankee-kun na Yamada-kun to Megane-chan to Majo | 2015-08-26 | |
| Movie | The Laws Of The Universe - Part 0 | Ray (voice) | 2015-09-26 |
| Series | Knights of Sidonia | Nagate Tanikaze (voice) | 2014-04-11 |
| Movie | Meisou! Underworld | Seita | 2014-04-14 |
| Series | Brynhildr in the Darkness | Ryouta Murakami | 2014-04-06 |
| Movie | シュガー*ソルジャー | 2014-04-04 | |
| Series | Argevollen | Susumu Tokimune (Main Character) | 2014-07-03 |
| Series | If Her Flag Breaks | Souta Hatate | 2014-04-06 |
| Series | Hamatora | Nice | 2014-01-08 |
| Series | Glasslip | Kakeru Okikura (voice) | 2014-07-03 |
| Movie | Tales of Zestiria: The Shepherd's Advent | Mikleo (voice) | 2014-12-30 |
| Movie | Attack on Titan: Crimson Bow and Arrow | Marco Bodt (voice) | 2014-11-22 |
| Movie | Yamada-kun to 7-nin no Majo (OVA) | Ryuu Yamada (voice) | 2014-12-17 |
| Series | Your Lie in April | Ryouta Watari (voice) | 2014-10-10 |
| Series | Gundam Reconguista in G | Klim Nick (voice) | 2014-10-02 |
| Series | Denki-gai | Umio | 2014-10-02 |
| Movie | Rescue Me! | Masayuki Mizutani | 2013-06-20 |
| Series | Valvrave the Liberator | Haruto Tokishima (voice) | 2013-04-12 |
| Series | Oreshura | Eita Kidou (voice) | 2013-01-06 |
| Series | The Devil Is a Part-Timer! | Sadao Maō (voice) | 2013-04-04 |
| Series | Attack on Titan | Man (voice) | 2013-04-07 |
| Series | Blood Lad | Blood Charlie Staz | 2013-07-08 |
| Series | Ace of the Diamond | Eijun Sawamura (voice) | 2013-10-06 |
| Series | Gatchaman Crowds | Sugane Tachibana (voice) | 2013-07-13 |
| Series | Nagi-Asu: A Lull in the Sea | Kaname Isaki (voice) | 2013-10-03 |
| Series | Strike the Blood | Motoki Yaze (voice) | 2013-10-04 |
| Series | Super Seisyun Brothers | Chika Shinmoto (voice) | 2013-09-14 |
| Movie | Code Geass: Akito the Exiled 2: The Wyvern Divided | (voice) | 2013-09-14 |
| Series | Tsundere Inran Shoujo Sukumi | Yui | 2012-02-17 |
| Series | High School D×D | Vali Lucifer | 2012-01-06 |
| Series | Tsuritama | Yuki Sanada (voice) | 2012-04-13 |
| Series | JoJo's Bizarre Adventure | Mark (voice) | 2012-10-06 |
| Series | OniAi | Akito Himenokoji (voice) | 2012-10-05 |
| Series | My Little Monster | Sohei Sasahara (voice) | 2012-10-02 |
| Series | From the New World | Ryou Inaba (voice) | 2012-09-29 |
| Series | Aquarion | Sukuna (voice) | 2005-04-05 |