Costumes
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| Odin Sphere | 27 costumes | 10 videos | |
| Oh! Super Milk-chan | 3 costumes | 1 videos | |
| Ohayocon Mascot | 0 costumes | 1 videos | |
| Ojamajo Doremi | 12 costumes | 2 videos | |
| Okage | 3 costumes | 1 videos | |
| Okami | 19 costumes | 10 videos | |
| On Your Mark | 1 costumes | ||
| One Piece | 354 costumes | 46 videos | |
| One Pound Gospel | 0 costumes | 1 videos | |
| One ~Kagayaku Kisetsu e~ | 1 costumes | ||
| One2 | 1 costumes | ||
| Onegai My Melody | 2 costumes | ||
| Onegai Teacher | 4 costumes | ||
| Oni | 0 costumes | 1 videos | |
| Oniisama E... | 1 costumes | ||
| Onimusha 3 | 1 costumes | ||
| Original Design | 171 costumes | 201 videos | |
| Original: Fantasy | 101 costumes | 22 videos | |
| Original: Historical / Renaissance | 63 costumes | 13 videos | |
| Original: Science Fiction | 9 costumes | 18 videos | |
| Original: Gothic Lolita / EGL / EGA | 101 costumes | 9 videos | |
| Original: Lolita | 23 costumes | 3 videos | |
| Original: Steampunk | 24 costumes | ||
| Orion | 1 costumes | 2 videos | |
| Oruchuban Ebichu | 1 costumes | ||
| OS-Tan Girls | 3 costumes | ||
| Osu! Tatakae! Ouendan | 6 costumes | ||
| Otakon Mascot | 2 costumes | ||
| Otaku no Video | 1 costumes | 1 videos | |
| Otakuthon Mascot | 1 costumes | ||
| Other Boleyn Girl, The | 1 costumes | ||
| Otome wa Boku ni Koishiteru | 1 costumes | ||
| Ouran High School Host Club | 308 costumes | 50 videos | |
| Ouroboros Ring | 1 costumes | ||
| Outlaw Star | 31 costumes | 7 videos | |
| Overman King Gainer | 2 costumes | ||
| Oxide 2 | 2 costumes | ||
| Oz no Mahōtsukai | 1 costumes |
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