(C76) [OVACAS (Hirokawa Kouichirou)] Houkago XX Time (K-ON!)
Otonano Omochiya 12 Futaba no Ohanashi Matome 2
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star)
(C78) [Shuudan Bouryoku (Murasaki Syu)] Hooliganism 17 Record of ALDELAYD Act.12 Exhibition DX9 (English) =LWB=
[OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] Deep impact (Cosmic Baton Girl Comet-san)
COMIC Penguinclub Sanzokuban 2002-12
(C70) [OVACAS (Hirokawa Kouichirou)] Magical? Banana (Renkin 3-kyuu Magical? Pokaan)
Men's Dolphin 1999-11-01 Vol.03
(Tougetsu-sai) [OVACAS (Hirokawa Kouichirou)] IYASI-K (Pani Poni)
Otonano Omochiya Vol. 13
Otonano Omochiya 17
(CR35) [Abellcain (Fujimaru Arikui)] KALEIDOSCOPE (Kaleidostar)
Kono subarashī Amahito-chan no demisōsu!
(C78) [Shuudan Bouryoku (Various)] Hooliganism 17 Record of ALDELAYD Act.12 Exhibition DX9
COMIC Penguin Club Sanzokuban 2001-06
Otonano Omochiya Vol. 14
Otonano Omochiya 6 Kan
KupaaBon 3
COMIC Penguinclub Sanzokuban 2002-10
(SC19) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Rotation (Gundam SEED)
(C52) [Raimusha (Various)] Ebisu Taisen Kanzenban (Sakura Taisen)
Otonano Omochiya Vol.13
Hungar x Hungar One Pause (Hunter x Hunter One Piece)
(SC16) [Ovacas (Hirokawa Kouichirou)] Nichiyou Asa no 8-ji 30-bu (Ojamajo Doremi)
[Hirokawa Tomo] Fresh Meat!
[Anthology] Dennou Butou Musume Vol 5
COMIC Penguinclub Sanzokuban 2003-08
(C76) [OVACAS (Hirokawa Kouichirou)] Asamade Training (Issho ni Training)
(C83) [OVACAS (Hirokawa Kouichirou)] Buratei Heart. (Joshiraku)
Otonano Omochiya Vol.6 - Ch.4-5
(C66) [INFINITY-FORCE (Various)] VS∞ VURSUS INFINITY (Capcom vs. SNK)
Takamori Aiko hamedori manga
(Puniket 19) [Hirokaworld (Hirokawa)] Shiikibi (Various)
(CR36) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Iron Maiden (Genshiken, Kujibiki Unbalance)
(ABC 5) [OVACAS (Hirokawa Kouichirou)] Iro Iro Gal and Dou (Various)
(SC23) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Precure Machine (Futari wa Precure)
(Puniket 12) [OVACAS (Hirokawa Kouichirou)] Sensei dazo! (Pani Poni)
[Hirokawa Kouichirou] Deep Trip
Pachie-bon
(SC23) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Precure Machine (Pretty Cure)
Otonano Omochiya Vol. 15
(C66) [INFINITY-FORCE (Mercy Rabbit)] VS∞ VURSUS INFINITY (Capcom vs. SNK)
COMIC Penguin Club Sanzokuban 2000-09
(Comic Castle Final) [Nipopo Crisis, OVACAS (Genka Ichien, Hirokawa Kouichirou) Patsukin Dynamite HEAVEN (Bakusou Kyoudai Lets & Go!!)
(C75) [Ovacas (Hirokawa Kouichirou)] Ovacas Style 2008 (Kannagi, Queen's Blade, Strike Witches)
(C73) [OVACAS (Hirokawa Kouichirou)] Banchou Densetsu (Minami-ke)
(CR27) [Dangan Densetsu Laser (Hirokawa Tomo, Nerima Yoshito)] Kairaku Gensoku Hagurumashiki Soutei Souchi (Revolutionary Girl Utena)
COMIC Penguin Club Sanzokuban 2001-04
[Tamaki Nozomu] Kokuminteki Kanojo Irokawa Mayu no Zenbu
(C57) [OVACAS (Hirokawa Kouichirou)] Doremix Deluxe (Ojamajo Doremi)
(C65) [Infinity-Force (Various)] BL Are Go!! (Machine Robo Rescue)
(C69) [KNOCKOUT (Various)] Oshiri de Kyu! 9 (Various)
(C90) [Hooliganism (Murasaki Syu, Hirokawa Kouichirou)] Kono Subarashii Demi-chan no Demi Sauce! (Demi-chan wa Kataritai, Kono Subarashii Sekai ni Syukufuku o!)
[INFINITY-FORCE (Various)] Digitama 04 FRONTIER (Digimon Tamers, Digimon Frontier)
(COMIC1) [OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] Itazura Drill (Tengen Toppa Gurren Lagann)
(C66) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 5 (Pretty Cure)
[Kantou Usagi Gumi] Pink Kami Keikaku (Various)
[Dangan Densetsu (Hirokawa Tomo)] Fairy Shape (Final Fantasy VIII)
(Puniket 9) [Marchen Box (Various)] Two Toned Romps (Pretty Cure)
(C82) [OVACAS (Hirokawa Kouichirou)] Osaki mo Mae mo Marii-san. (Joshiraku)
(Puniket 9) [Hirokaworld (Hirokawa)] Nyaa Hon
(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)
Otonano Omochiya Vol. 16
(C71) [OVACAS (Hirokawa Kouichirou)] BITCH STYLE (WITCHBLADE) [English] [desudesu]
(C69) [OVACAS (Hirokawa Kouichirou)] 1-NEN C-GUMI MAHOGUMI (Pani Poni)
(C76) [OVACAS (Hirokawa Kouichirou)] Houkago XX Time | After School XX Time (K-ON!) [English] [Darknight]
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star) [English] [desudesu]
(C65) [INFINITY-FORCE (Various)] BL Are Go!! (Machine Robo Rescue)
(Mimiket 3) [OVACAS (Hirokawa Kouichirou)] Zoids Tanekentai Born Free (ZOIDS)
Capricon I - Director's Cut
[OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia Kaiteiban (Manabi Straight!)
[Yumeizukosya, OVACAS (Hirokawa Kouichirou)] Ebisu Taisen (Sakura Taisen)
COMIC Penguinclub Sanzokuban 2003-12
(Puniket 21) [Hirokaworld (Hirokawa)] Kojikabon Plus (Kodomo no Jikan)
[Anthology] Love Chara Taizen No. 6
[OVACAS (Hirokawa Kouichirou)] Kashi 1114 (Ojamajo Doremi)