| Country | Title | Year | Avg. (nb) | ||
1
2
|
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| Hong-Kong | Once Upon a Time in China TV : The Eight Assassins | 黃飛鴻之八大天王 | 1996 | ||
| Japan | Captain Tsubasa | キャプテン翼 | 1983 | 3.54 (13 Reviews) | |
| Orphen | 魔術士オーフェン | 1998 | 3.88 (2 Reviews) | ||
| Mimu, the Traveller of Many Dreams | ミームいろいろ夢の旅 | 1983 | 1 (1 Reviews) | ||
| One Piece | One Piece | 1999 | 3.25 (1 Reviews) | ||
| Otome no Punch | 2008 | ||||
| Please! Teacher | おねがい☆テェーチャー | 2002 | |||
| Otogi Zoshi | お伽草子 | 2004 | |||
| Oh! Mikey Hardcore | 2005 | ||||
| Outlaw Star | 星方武侠アウトロースター | 1998 | |||
| Maeterlinck's Blue Bird | メーテルリングの青い鳥 チルチルミチルの冒険旅行 | 1980 | |||
| Overman King Gainer | オーバーマン キングゲイナー | 2002 | |||
| Please Twins ! | おねがい☆ツインズ | 2003 | |||
| Platinumhugen Ordian | 銀装騎攻オーディアン | 2000 | |||
| Korea | Oh feel young feel so young | 오! 필승 봉순영 | 2004 | ||
| Oh! My Lady | 2010 | ||||
| Over the Rainbow | 2006 | ||||
| One Mom and Three Dads | 아빠셋 엄마하나 | 2008 | |||
| Only You | 온리 유 | 2005 | |||
| On Air | 온에어 | 2008 | |||
