Ooedo Rocket
- Oh! Edo Rocket

Oofuri
- Big Windup!
- Ookiku Furikabutte

Oofuri - Kihon no Kihon!
- Big Windup! - Special 1
- Ookiku Furikabutte - The Basics of Basics

Oofuri 2
- Big Windup! 2
- Ookiku Furikabutte: Natsu no Taikai Hen

Ookami Kakushi

Ookami Kodomo no Ame to Yuki
- Wolf Children
- The Wolf Children Ame and Yuki

Ookami Shoujo to Kuro Ouji
- Wolf Girl and Black Prince
- Wolf Girl & Black Prince

Ookami Shoujo to Kuro Ouji OAD
- Wolf Girl and Black Prince OAD
- Wolf Girl & Black Prince OAD

Ookami to Kohaku-iro no Yuuutsu
- Spice and Wolf: Wolf and Amber Melancholy
- Spice and Wolf II OVA

Ookami to Koushinryou
- Spice and Wolf

Ookami to Koushinryou II
- Spice and Wolf II

Ookami to Koushinryou II Special
- Spice and Wolf II Special

Ookami to Koushinryou: Merchant Meets the Wise Wolf
- Spice and Wolf: Merchant Meets the Wise Wolf

Ookami-san to Shichinin no Nakama-tachi

Ookami-san wa Taberaretai
- I Want to Be Eaten by a Wolf

Ookii 1 Nensei to Chiisana 2 Nensei
- The Big First-Grader and the Small Second-Grader

Ookiku Furikabutte
- Big Windup!
- Oofuri

Ookiku Furikabutte - The Basics of Basics
- Big Windup! - Special 1
- Oofuri - Kihon no Kihon!

Ookiku Furikabutte: Natsu no Taikai Hen
- Big Windup! 2
- Oofuri 2

Oomuro-ke

Ooya-san wa Shishunki!

Ooyasan wa Shishunki!

Ooyuki Umi no Kaina
- Kaina of the Great Snow Sea

Ooyuki Umi no Kaina: Hoshi no Kenja
- Kaina of the Great Snow Sea: Star Sage

Ooyukiumi no Kaina
- Kaina of the Great Snow Sea