[Hirokawa Tomo] Fresh Meat!
[Anthology] Love Chara Taizen No. 7 (Various)
After School XX Time
(C62) [Knockout (Various)] Oshiri de Kyu! 7 (Various)
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star)
(Puniket 12) [OVACAS (Hirokawa Kouichirou)] Sensei dazo! (Pani Poni Dash!)
(COMIC1☆2) [OVACAS (Hirokawa Kouichirou)] Kurobeta (Minami-ke)
Otonano Omochiya 6 Kan
Otonano Omochiya 12 Futaba no Ohanashi Matome 2
(C71) [OVACAS (Hirokawa Kouichirou)] BITCH STYLE (WITCHBLADE) [English] [desudesu]
(C73) [OVACAS (Hirokawa Kouichirou)] Banchou Densetsu (Minami-ke)
(Puniket 9) [Marchen Box (Various)] Two Toned Romps (Pretty Cure)
Otonano Omochiya 17
(SC16) [Ovacas (Hirokawa Kouichirou)] Nichiyou Asa no 8-ji 30-bu (Ojamajo Doremi)
Haru Matsuri Chichi Matsuri 2010
(C74) [OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] S.M.S Niyoukoso! (Macross Frontier)
(C81) [Manchin Sakura (COSiNE ,Erect Sawaru and more) Chun-li san to COSiNE ni Shuu Shuunen Kinen Hon (Street Fighter)
[Shuudan Bouryoku (集団暴力)] HOOLIGANISM File/10 RECORD OF ALDELAYD ExhibitionDX2
Otonano Omochiya Vol. 16
Pachie-bon
(C70) [OVACAS (Hirokawa Kouichirou)] Magical? Banana (Renkin 3-kyuu Magical? Pokaan)
Otonano Omochiya Vol.6 - Ch.4
[Hirokawa Tomo] Cherry Concerto
(C54) [OVACAS (Various)] Capricon 1 Director's Cut (Various)
Otonano Omochiya Vol. 16
(Puniket 12) [OVACAS (Hirokawa Kouichirou)] Sensei dazo! (Pani Poni)
Otonano Omochiya 12 Futaba no Ohanashi Matome 12
(Puniket 9) [Hirokaworld (Hirokawa)] Nyaa Hon
(C90) [Hooliganism (Murasaki Syu, Hirokawa Kouichirou)] Kono Subarashii Demi-chan no Demi Sauce! (Demi-chan wa Kataritai, Kono Subarashii Sekai ni Syukufuku o!)
[Kantou Usagi Gumi] Pink Kami Keikaku (Various)
(Mimiket 3) [OVACAS (Hirokawa Kouichirou)] Zoids Tanekentai Born Free (ZOIDS)
(C66) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 5 (Pretty Cure)
[INFINITY-FORCE (Various)] Digitama 04 FRONTIER (Digimon Tamers, Digimon Frontier)
(C78) [Shuudan Bouryoku (Various)] Hooliganism 17 Record of ALDELAYD Act.12 Exhibition DX9
(C80) [OVACAS (Hirokawa Kouichirou)] A STYLE. (A Channel)
(COMIC1) [OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] Itazura Drill (Tengen Toppa Gurren Lagann)
(ABC 5) [OVACAS (Hirokawa Kouichirou)] Iro Iro Gal and Dou (Various)
(C69) [OVACAS (Hirokawa Kouichirou)] 1-NEN C-GUMI MAHOGUMI (Pani Poni)
[Yumeizukosya, OVACAS (Hirokawa Kouichirou)] Ebisu Taisen (Sakura Taisen)
(SC23) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Precure Machine (Pretty Cure)
Otonano Omochiya Vol.13
COMIC Penguinclub Sanzokuban 2003-08
(C66) [INFINITY-FORCE (Mercy Rabbit)] VS∞ VURSUS INFINITY (Capcom vs. SNK)
(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)
[OVACAS (Hirokawa Kouichirou)] Kashi 1114 (Ojamajo Doremi)
[Amadeus No Isan] Rapid Game {To Heart 2}
(C60) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 3 (Various)
(CSP4) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri (School Rumble, Mai-HiME)
(C63) [OVACAS (Hirokawa Kouichirou)] Shirobom (Bomberman Jetters)
(C66) [Shuudan Bouryoku (Various)] File/12 Record of Aldelayd - EXHIBITION DX4
Otonano Omochiya Vol. 16
(C77) [OVACAS (Hirokawa Kouichirou)] Love Style (Love Plus)
(C52) [Raimusha (Various)] Ebisu Taisen Kanzenban (Sakura Taisen)
KupaaBon 3
(C65) [INFINITY-FORCE (Various)] BL Are Go!! (Machine Robo Rescue)
(C62) [KNOCKOUT (Various)] Oshiri de Kyu! 7 (Various)
Otonano Omochiya Vol. 14
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star)
(C76) [OVACAS (Hirokawa Kouichirou)] Houkago XX Time (K-ON!)
Otonano Omochiya 6 Kan
Men's Dolphin 1999-11-01 Vol.03
(CT20) [OVACAS (Hirokawa Kouichirou)] Bouhatei no Onna. (Joshiraku)
COMIC Penguinclub Sanzokuban 2003-12
(C65) [OVACAS (Hirokawa Kouichirou)] FLOW MY TEARS A SENIOR SAID (Uchuu No Stellvia)
(C64) [KNOCKOUT (Various)] Oshiri de Kyu! 8 (Various)
(Puniket 21) [Hirokaworld (Hirokawa)] Kojikabon Plus (Kodomo no Jikan)
(C79) [OVACAS (Hirokawa Kouichirou)] Tenshi(Bitch) ni Love Song o! (Panty & Stocking with Garterbelt)
(C57) [OVACAS (Hirokawa Kouichirou)] Doremix Deluxe (Ojamajo Doremi)
(C76) [OVACAS (Hirokawa Kouichirou)] Asamade Training (Issho ni Training)
(Futaket vs. ABC ~Hentaisai~) [OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia (Manabi Straight!)
Otonano Omochiya 12 Futaba no Ohanashi Matome 2
(C84) [OVACAS (Hirokawa Kouichirou)] Kedamono-tachi no YAMATO. (Space Battleship Yamato 2199)
(C68) [OVACAS (Hirokawa Kouichirou)] MAI-CCHING (Mai-HiME)
[Anthology] Love Chara Taizen No. 7 (Various)
[Hirokawa Tomo] Puripanyu Z
(C68) [OVACAS (Hirokawa Kouichirou)] MAI-CCHING (Mai-HiME) [English] [SaHa]
(C62) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 4 Sokuon (Azumanga-Daioh)
(C70) [OVACAS (Hirokawa Kouichirou)] Magical? Banana (Renkin 3-kyuu Magical? Pokaan)
(Puniket 19) [Hirokaworld (Hirokawa)] Shiikibi (Various)
Magical? Banana
[Hirokawa Kouichirou] Deep Trip
Otonano Omochiya Vol. 15
(C69) [KNOCKOUT (Various)] Oshiri de Kyu! 9 (Various)
[Amatoro Bow] Hanarete Ite mo Hito ni Fureru Otoko
[Hirokaworld (Hirokawa)] petta
(C81) [OVACAS (Hirokawa Kouichirou)] SUITE&BITCH (Suite Precure)
[Dangan Densetsu (Hirokawa Tomo)] Fairy Shape (Final Fantasy VIII)
Otonano Omochiya 6 Kan
[OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] Deep impact (Cosmic Baton Girl Comet-san)
(C64) [Abellcain (Fujimaru Arikui)] Lucky Come Come (Kujibiki Unbalance)
(C67) [OVACAS (Hirokawa Kouichirou)] HIME-Hajime (My-HiME)
COMIC Penguin Club Sanzokuban 2001-06