O
- Onisake 5
- Onizukachris 2
- Onna Kishi No Shiro 2
- Onnanoko Payapaya 1
- Onomatopoeia 1
- Onsen 2
- Onsoku Ubaguruma 12
- Ooarai Nourakudou 3
- Oohashiya 1
- Ooitei 1
- Oojikake 1
- Oojinushi 7
- Ookina Gomibako 2
- Oozora Kaiko 1
- Op88 1
- Opaque 4
- Operating Room 4
- Oppai Baibai 6
- Oppai Brothers 1
- Orange blossom 1
- Orange Bullet 10
- Orange Channel 6
- Orange Crown 1
- Orange Milk Donuts 1
- Orange Peel 1
- Orange Peels 11
- Orange Typhoon 3
- Orange-Soft 8
- OrangeMaru 74
- Orc Soft 7
- Ore No Sasakure 8
- Oregun 5
- Oreichigo 1
- Oremuha X 2
- Orenjiru 4
- Orenjiya 3
- Oretachi Misnon Ikka 19
- Oreteki18kin 2
- Orgasm Slap 2
- Oricomplex 13
- Orimidoro 1
- Oroboy 4
- Ororiya Enpitsudo 9
- Oroshi Ponzu 1
- Ortensia 7
- Orugouru 1
- Orz 4
- Osaka Lucha Libre 1
- Osamuya 1
- Osaru No Noumiso 8
- Osenbei No Mori 8
- Oshaban 3
- Oshaburi Tengoku 1
- Oshinobu No Yakata 1
- Oshiruko Kan 31
- Oshisyo-san 1
- Osiris 2
- Osterei 3
- Ostin Shop 2
- Osu To Mesu 1
- Ota 1
- Ota Office 1
- Otabe Dynamites 34
- Otajai 2
- Otaku Beam 44
- Otakulife Japan 1
- Otama Jacuzzi 1
- Otaut-R 1
- Otemoto 1
- Otentomaru 3
- Othello Ice 25
- Otiba 2
- Otn Koukoku 1
- Otogi No Kuni No Soapland 12
- Otogiya 3
- Otohimedou 1
- Otokojuku 2
- Otokonoko Daisuki Iinchou 1
- Otokonoko De Asobou 7
- Otokonoko To Onnanoko 4
- Otome No Eden 1
- Otomekibun 41
- Otona no Marushiki 1
- Otona No Youchien 1
- Otona Shuppan 6
- Otona Star 4
- Otona Teikoku 1
- Otonagokko Iinkai 2
- Otonano Do-Wa 32
- Otonano Omochiya 15
- Otoreko 8
- Otosan No Kurorekishi 3
- Otukimi Koubo 10
- Otukimidango 1
- Ou-sama Genkou Kumiai 1
- Oukokusan 4
- Ourakuen 2
- Outrate 2
- Outroad 1
- Ouun 2
- Ovacas 5
- Over3 1
- Overcrowd 1
- Overdose 1
- Overdrive 1
- Overkill 1
- Oving 33
- Owakari Itadaketa Darou Ka 3
- Oxg 4
- Oxide.lab 6
- Oyama Kikunosuke Vs 1
- Oyogi 2
- Ozashiki 18
- Ozitan Yasan 4
- Ozone 4
P
- P Herb 2
- P Shoukai 3
- P-Collection 19
- P-Forest 29
- P-Kan 7
- P-land 1
- P-Lemo 3
- P-me 4
- P-point 2
- P.a. Project 9
- P.box 1
- P.d Crown 2
- P.P 33
- P.s. 1
- P.y.l... 1
- P.y.works 1
- Pag-Pag-Magu 1
- Paint Lab 2
- Paintingbird 2
- Pairesshu 1
- Paitoro Pump 1
- Pakomucchi 1
- Pakupikubon 1
- Palace Inubousaki 1
- Palace Village Ke 2
- Pale Scarlet 10
- Palepink 1
- Pallonia Comix 2
- Palm Sunday 3
- Pamunosu 6
- Pan Koujou 1
- Pan To Butterfly. 5
- Pana Land 3
- Panda 4gou 1
- Panda Boxing 1
- Panda Cotta 4
- Panda Ekisu 4
- Panda No Kanzume 5
- Pandagaippiki. 10
- Pandalix 2
- Pandaniku 5
- Pandora Box 3
- Panis Angelics 2
- Panjandrum 1
- Pannacotta 13
- Pantie Party Project 1
- Pantsless 1
- Pantwo 3
- Panzer 1
- Panzers 11
- Paopaship 2
- Paperboy 1
- Papercrown 1
- Papuka 2
- Paradiddle 4
- Paradise D Products 3
- Paradise Lost 2
- Paradisegom 17
- Paraiso Saigu 2
- Paranoia Cat 26
- Parasite Garden 1
- Parasute 2
- Parin To Wareru 9
- Pariparicandy 1
- Parity Nyuu 2
- Part K 31
- Parufe Don 1
- Parupunte 8
- Past Gadget 2
- Pastel White 1
- Pastel Wing 4
- Pastel Wing Cherryice 1
- Patricide 2
- Pe And Pi 2
- Pe Theta 23
- Peach Candy 6
- Peach Fox 6
- Peachpulsar 54
- Peanuts Koubou 4
- Peanutsland 2
- Pecan 1
- Peimond 2
- Peko Renmei 3
- Pell Doukoukai 1
- Pencilbox 3
- Penguindou 7
- Penguinon 2
- Penpengusa Club 8
- Pentacle 14
- People Punch 1
- Peppy Angel 1
- Perceptron 6
- Perestroika 16
- Perilab 1
- Period 1
- Permission 9
- Peropero Usagi 1
- Peroppoi Tokoro 2
- Perorimeshi. 1
- Personal Color 2
- Personal Space 3
- Pesakd 1
- Petapan 16
- Petapetapeta 1
- Petica 2
- Petit Ego 1
- Petit Machiya 4
- Petite X Cerisier 4
- Petra-beta 1
- Pets 3
- Pettan Doujou 15
- Pez. 1
- Pfactory 2
- Phantomcross 7
- Philanthropy 1
- Philia 1
- Photonix 1
- Pianiishimo 24
- Picapica Suppa 2
- Piccione 1
- Pico Pico Labyrinth 8
- Picosolenodon 1
- Picotama. 1
