[Hirokawa Kouichirou] Deep Trip | 銷魂之旅 [Chinese]
(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)
(C54) [OVACAS (Various)] Capricon 1 Director's Cut (Various)
(C52) [Raimusha (Various)] Ebisu Taisen Kanzenban (Sakura Taisen)
Otonano Omochiya Vol. 16
(Puniket 19) [Hirokaworld (Hirokawa)] Shiikibi (Various)
Capricon I - Director's Cut
[Yumeizukosya, OVACAS (Hirokawa Kouichirou)] Ebisu Taisen (Sakura Taisen)
(C66) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 5 (Pretty Cure)
(C90) [Hooliganism (Murasaki Syu, Hirokawa Kouichirou)] Kono Subarashii Demi-chan no Demi Sauce! (Demi-chan wa Kataritai, Kono Subarashii Sekai ni Syukufuku o!)
(C79) [OVACAS (Hirokawa Kouichirou)] Tenshi(Bitch) ni Love Song o! (Panty & Stocking with Garterbelt)
(C78) [OVACAS (Hirokawa Kouichirou)] Love Style Plus (Love Plus)
(C75) [Ovacas (Hirokawa Kouichirou)] Ovacas Style 2008 (Kannagi, Queen's Blade, Strike Witches)
(C56) [OVACAS (Various)] Dore Mix (Ojamajo Doremi)
COMIC Penguinclub Sanzokuban 2002-10
Comic Sigma Volume 1
(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 (Various)
(C76) [OVACAS (Hirokawa Kouichirou)] Houkago XX Time | After School XX Time (K-ON!) [English] [Darknight]
[Kantou Usagi Gumi] Pink Kami Keikaku (Various)
Pachie-bon
(C66) [INFINITY-FORCE (Mercy Rabbit)] VS∞ VURSUS INFINITY (Capcom vs. SNK)
(Futaket vs. ABC ~Hentaisai~) [OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia (Manabi Straight!)
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star) [English] [desudesu]
[Hirokawa Tomo] Cherry Concerto
Otonano Omochiya 6 Kan
(C61) [OVACAS (Hirokawa Kouichirou)] S.F.3.D (Various)
[Otonano Omochiya (Hirokawa)] Otonano Omochiya 12 Futaba no Ohanashi Matome 2 [English] [Digital] [Ongoing]
[Otonano Omochiya (Hirokawa)] Otonano Omochiya Vol. 15 [English]
(Suika Musume 3) [Ovacas (Hirokawa Kouichirou)] Asama de Training (Issho ni Training)
Otonano Omochiya 12 Futaba no Ohanashi Matome 2
Men's Dolphin 1999-11-01 Vol.03
Magical? Banana
(C69) [KNOCKOUT (Various)] Oshiri de Kyu! 9 (Various)
[Otonano Omochiya (Hirokawa)] Otonano Omochiya 3 Kan
(C78) [OVACAS (Hirokawa Kouichirou)] Love Style Plus (Love Plus) [English] [shakuganexa]
Love Style
[Hirokawa Kouichirou] Deep Trip
COMIC Penguinclub Sanzokuban 2003-12
(SC27) [Hirokaworld (Hirokawa)] 15/21 (3-nen B-gumi Kinpachi Sensei Densetsu no Kyoudan ni tate!)
(C56) [Doudan Tsutsuji (Doudantsutsuji, Hirokawa Tomo)] Getten! (Mamotte Shugogetten)
Otonano Omochiya Vol. 14
[OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia Kaiteiban (Manabi Straight!)
(C77) [OVACAS (Hirokawa Kouichirou)] Love Style (Love Plus)
KupaaBon 3
(CR27) [Dangan Densetsu Laser (Hirokawa Tomo, Nerima Yoshito)] Kairaku Gensoku Hagurumashiki Soutei Souchi (Revolutionary Girl Utena)
(C84) [OVACAS (Hirokawa Kouichirou)] Kedamono-tachi no YAMATO. (Space Battleship Yamato 2199)
COMIC Penguinclub Sanzokuban 2002-12
[Hirokawa Tomo] Puripanyu Z
Two Toned Romps
[Hirokaworld (Hirokawa)] Neko Ebon Plus
(SC19) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Rotation (Gundam SEED)
Otonano Omochiya Vol. 13
(C70) [OVACAS (Hirokawa Kouichirou)] Magical? Banana (Renkin 3-kyuu Magical? Pokaan)
[Anthology] Love Chara Taizen No. 7 (Various)
(C73) [OVACAS (Hirokawa Kouichirou)] Banchou Densetsu (Minami-ke)
[Amadeus No Isan] Rapid Game {To Heart 2}
(Puniket 11) [Hirokaworld (Hirokawa)] Pachie-bon (3-nen B-gumi Kinpachi Sensei Densetsu no Kyoudan ni tate!)