- O desenho mangá
- O Maidens In Your Savage Season Volume 3
- O Maidens In Your Savage Season Volume 4
- O Maidens in Your Savage Season Volume 5
- O Recruta Endi
- O-Parts Hunter, Vol. 12
- O-Parts Hunter, Vol. 9
- Obsessions of an Otome Gamer Volume 2
- Ocean/Orbiter Deluxe Edition
- ODA CINNAMON NOBUNAGA Volume 1
- ODA CINNAMON NOBUNAGA Volume 2
- ODA CINNAMON NOBUNAGA Volume 3
- ODA CINNAMON NOBUNAGA Volume 4
- Ode to Kirihito
- Ode to Kirihito
- Of the Red, the Light, and the Ayakashi, Vol. 10
- Of the Red, the Light, and the Ayakashi, Vol. 6
- Of the Red, the Light, and the Ayakashi, Vol. 7
- Of the Red, the Light, and the Ayakashi, Vol. 8
- Of the Red, the Light, and the Ayakashi, Vol. 9
- Officiers et Gentilshommes
- Oh, My Sweet Alien!
- Ojojojo Vol. 1
- Ojojojo Vol. 2
- Ojojojo Vol. 3
- Ojojojo Vol. 4
- Oku-san’s Daily Fantasies