Okiayu Ryoutarou roles (games)
Ryoutarou has done the following roles in games.
| Aisle Lord [Mega Drive] | Chusea |
| Animal Magnetism [Win95, Win98] | Kuro |
| Another Century's Episode 2 [PlayStation 2] | Akatsuki Nagare |
| Arc the Lad -Seirei no Tasogare- [PS2] | Densimo |
| Bleach -Hanatareshi yabou- [PlayStation 2] | ? |
| BLEACH The 3rd Phantom [NDS] | ? |
| Bloody Roar -Primal Fury- [GameCube, Xbox] | Long Shin |
| Boys Be... Typing Renai Hakusho [PlayStation 2] | Toshiya |
| Bushidou Blade 2 [Playstation] | Sazanka |
| Chou Aniki Kyuukyoku Muteki Ginga Saikyou Otoko [Playstation] | Idaten |
| Chou Battle Houshin [PS2] | ? |
| Choujin Gakuen Gowcaizer [Arcade, PlayStation] | ? |
| Choujin Gakuen Gowkaizer [arcade] | Shigure Kyousuke |
| Choujin Gakuen Gowkaizer [arcade] | Fudoumaru |
| Cyber Formula Aratanaru Chousensha [Playstation] | Frantz Heinel |
| Der Langrisser [PC FX] | Leon |
| DIRGE of CERBERUS -FINAL FANTASY VII- [PlayStation 2] | Nero |
| Doki Doki On Air [Windows, Mac, Playstation] | guest |
| Dracula X [Playstation] | Alucard |
| Dragon Force II [Sega Saturn] | Shien |
| Dragon Knight 4 [PC FX] | Eto |
| Dragon Knight 4 [Playstation] | Eto |
| Eiyuu Online [Windows] | Kenkon Ikken |
| El Hazard [Sega Saturn] | Jinnai Katsuhiko |
| Eternal Arcadia [Dreamcast] | Alfonso |
| Etude Prologue [Sega Saturn, Windows] | Hiroshi |
| EVE The Lost One [Sega Saturn] | Kouji |
| Friends Seishun no Kagayaki [Sega Saturn] | Takiguchi Yousuke |
| Game Tengoku [Sega Saturn] | Z Dyke Mk II |
| Geometry Duel [PlayStation] | Izuru |
| Grow Lanser [Playstation, PSP] | Arnet Ryel |
| Gun Hard [Playstation] | Ashe |
| Hana Yori Dango: Koiseyo Joshi! [NDS] | Nishikado Soujirou |
| Harukanaru Toki no Naka de 2 [Playstation 2] | Akuram |
| Harukaze Sentai V Force [Playstation] | Zai |
| Haunted Junction [Playstation] | Aka-manto-kamen |
| Himitsu Sentai Metamor V [Playstation] | Grams |
| Irregular Hunter X [PSP] | Zero |
| Kekkon -Marriage- [Playstation, Sega Saturn] | Takagi Shimon |
| Kessen II [PlayStation 2] | Ma Chou |
| Kindaichi Shounen no Jikenbo [Sega Saturn] | Asagiri Takuya |
| Kouyasai [Playstation] | Takeshita Shou |
| Kuu wo Kiru! [Win95] | ? |
| Langrisser I and II [Playstation] | Leon |
| Langrisser IV [Sega Saturn] | player |
| Lunar 2 Eternal Blue [Sega Saturn] | Ronfa |
| Magic Knight Rayearth [Sega Saturn] | Inoova |
| Mugen no Frontier: Super Robot Taisen OG Saga [NDS] | Kasshe |
| Nadesico The Blank of 3 Years [Sega Saturn] | Akatsuki |
| Sakura -Setsugekka- [PlayStation 2] | Tawara Hideki |
| Sengoku Musou 2 Moushouden [PlayStation 2] | ? |
| Senkutsu Katsuryuu Taisen Chaos Seed [Sega Saturn] | ? |
| Shin Fortune Quest [Playstation] | Clay |
| Shining Force III [Sega Saturn] | Shinbiosu |
| Shining Force Neo [Playstation 2] | Baron |
| Shining Wind [PlayStation 2] | Trihalt |
| Shinkisekai Evolution [Dreamcast] | Oigen Ruitoporuto Shougun |
| Shiritsu Justice Gakuen [arcade] | Roy Bromwell |
| Shiritsu Justice Gakuen [PlayStation] | Narration 2 |
| Shiritsu Justice Gakuen [PlayStation] | Roy Bromwell |
| Sotsugyou M -Seito Kaichou no Karei naru Inbou- [PlayStation] | Takagi Shimon |
| Souraku Toshi OSAKA [PlayStation] | Nakamura Kouichirou |
| Super Robot Taisen Original Generations [PlayStation 2] | Raidiis |
| Tales of Destiny 2 [PlayStation 2, PSP] | Dimros |
| To Heart [Playstation] | Yajima |
| Tokimeki Memorial Irodori no Love Song [Playstation, Sega Saturn] | Takumi |
| Toushinden 2 [Playstation] | Kayin |
| Yuukyuu Gensoukyoku 2nd Album [Playstation, Sega Saturn] | Albelt Corraine |
| Yuukyuu Gensoukyoku [Playstation, Sega Saturn] | Albert |