(Tougetsu-sai) [OVACAS (Hirokawa Kouichirou)] IYASI-K (Pani Poni)
[Hirokawa Kouichirou] A to Z
[Hirokawa Kouichirou] Deep Trip
(C56) [Doudan Tsutsuji (Doudantsutsuji, Hirokawa Tomo)] Getten! (Mamotte Shugogetten)
Otonano Omochiya Vol. 16
[Hirokawa Kouichirou] Deep Trip | 銷魂之旅 [Chinese]
[Hirokaworld (Hirokawa)] Neko Ebon Plus
[ANTHOLOGY] Meganekko Deluxe
(C76) [OVACAS (Hirokawa Kouichirou)] Asamade Training (Issho ni Training)
Otonano Omochiya 6 Kan Ch. 1
(C66) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 5 (Pretty Cure)
Otonano Omochiya Vol. 15
(C64) [KNOCKOUT (Various)] Oshiri de Kyu! 8 (Various)
(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 (Various)
[Hirokaworld (Hirokawa)] Shiikibi (Various) [Digital]
Otonano Omochiya Vol.6 - Ch.4
(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)
COMIC Penguinclub Sanzokuban 2002-10
Otonano Omochiya 6 Kan
(C69) [OVACAS (Hirokawa Kouichirou)] 1-NEN C-GUMI MAHOGUMI (Pani Poni)
[Hirokaworld (Hirokawa)] petta
[Anthology] Dennou Butou Musume Vol 5
[Anthology] Love Chara Taizen No. 6
(SC19) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Rotation (Gundam SEED)
KupaaBon 3
[Otonano Omochiya (Hirokawa)] Otonano Omochiya 12 Futaba no Ohanashi Matome 2 [English] [Digital] [Ongoing]
(C56) [OVACAS (Various)] Dore Mix (Ojamajo Doremi)
Hungar x Hungar One Pause (Hunter x Hunter One Piece)
(C74) [OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] S.M.S Niyoukoso! (Macross Frontier)
(Comic Castle Final) [Nipopo Crisis, OVACAS (Genka Ichien, Hirokawa Kouichirou) Patsukin Dynamite HEAVEN (Bakusou Kyoudai Lets & Go!!)
Comic Sigma Volume 1
(C67) [OVACAS (Hirokawa Kouichirou)] HIME-Hajime (My-HiME)
[Hirokawa Tomo] Fresh Meat!
(C79) [OVACAS (Hirokawa Kouichirou)] Tenshi(Bitch) ni Love Song o! (Panty & Stocking with Garterbelt)
Pachie-bon
(C61) [OVACAS (Hirokawa Kouichirou)] S.F.3.D (Various)
(SC16) [Ovacas (Hirokawa Kouichirou)] Nichiyou Asa no 8-ji 30-bu (Ojamajo Doremi)
Capricon I - Director's Cut
(C80) [OVACAS (Hirokawa Kouichirou)] A STYLE. (A Channel)
(Puniket 21) [Hirokaworld (Hirokawa)] Kojikabon Plus (Kodomo no Jikan)
[Amadeus No Isan] Rapid Game {To Heart 2}
(C70) [OVACAS (Hirokawa Kouichirou)] Magical? Banana (Renkin 3-kyuu Magical? Pokaan)
(CR35) [Abellcain (Fujimaru Arikui)] KALEIDOSCOPE (Kaleidostar)
[COMIC] Penguinclub Sanzokuban 2003-02
(C62) [Knockout (Various)] Oshiri de Kyu! 7 (Various)
(C75) [Ovacas (Hirokawa Kouichirou)] Ovacas Style 2008 (Kannagi, Queen's Blade, Strike Witches)
[Yumeizukosya, OVACAS (Hirokawa Kouichirou)] Ebisu Taisen (Sakura Taisen)
(Puniket 6) [OVACAS (Hirokawa Kouichirou)] AxA (Ojamajo Doremi)
[Shuudan Bouryoku (Murasaki Syu)] Takanashi-san-chi no 4 Shimai - 1 (WORKING!!)
COMIC Penguinclub Sanzokuban 2003-12
[Otonano Omochiya (Hirokawa)] Otonano Omochiya Vol. 16 [English]
(COMIC1☆2) [OVACAS (Hirokawa Kouichirou)] Kurobeta (Minami-ke)
(CT20) [OVACAS (Hirokawa Kouichirou)] Bouhatei no Onna. (Joshiraku)
(SC23) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Precure Machine (Pretty Cure)
[Otonano Omochiya (Hirokawa)] Otonano Omochiya Vol. 15 [English]
(CR27) [Dangan Densetsu Laser (Hirokawa Tomo, Nerima Yoshito)] Kairaku Gensoku Hagurumashiki Soutei Souchi (Revolutionary Girl Utena)
(CR36) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Iron Maiden (Genshiken, Kujibiki Unbalance)
Otonano Omochiya Vol.13
(C62) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 4 Sokuon (Azumanga-Daioh)
[Anthology] Aokan Special
(C73) [OVACAS (Hirokawa Kouichirou)] Banchou Densetsu (Minami-ke)
Otonano Omochiya Vol. 1-14
(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 EVENT EDITION (Various)
[Kantou Usagi Gumi] Pink Kami Keikaku (Various)
[Dangan Densetsu (Hirokawa Tomo)] Fairy Shape (Final Fantasy VIII)
COMIC Penguinclub Sanzokuban 2003-11
大人のおもちや3巻
COMIC Penguin Club Sanzokuban 2001-06
Love Style
(C64) [Infinity-Force (Mercy Rabbit, Rokujou Mugi, Buruma Hogero, Hirokawa Kouichirou, Yamashita Woory)] MRR A GO!! (Machine Robo Rescue)
Otonano Omochiya Vol. 13
(C60) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 3 (Various)
(C61) [Dangan Densetsu (Hirokawa Tomo)] Kirakira no Haru (AIR, Kanon)
Ovacas Style 2008
(C67) [OVACAS (Hirokawa Kouichirou)] HIME-hajimeru (My-HiME) [English] [SaHa]
(C57) [OVACAS (Hirokawa Kouichirou)] Doremix Deluxe (Ojamajo Doremi)
(C99) [Otonano Omochiya (Hirokawa)] Otonano Omochiya 17 [Chinese]
(C66) [Shuudan Bouryoku (Various)] File/12 Record of Aldelayd - EXHIBITION DX4
(C84) [OVACAS (Hirokawa Kouichirou)] Kedamono-tachi no YAMATO. (Space Battleship Yamato 2199)
(C74) [Hirokaworld (Hirokawa)] Akiratama (Lucky☆Star)
[OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia Kaiteiban (Manabi Straight!)
(CSP4) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri (School Rumble, Mai-HiME)
(C63) [OVACAS (Hirokawa Kouichirou)] Shirobom (Bomberman Jetters)
(C77) [OVACAS (Hirokawa Kouichirou)] Love Style (Love Plus)
Otonano Omochiya Vol.6 - Ch.4-5
[INFINITY-FORCE (Various)] Digitama 04 FRONTIER (Digimon Tamers, Digimon Frontier)
(C76) [OVACAS (Hirokawa Kouichirou)] Houkago XX Time (K-ON!)
(C90) [Hooliganism (Murasaki Syu, Hirokawa Kouichirou)] Kono Subarashii Demi-chan no Demi Sauce! (Demi-chan wa Kataritai, Kono Subarashii Sekai ni Syukufuku o!)
Magical? Banana
[Hirokawa Kouichirou] PET LIFE
Tenshi ni Love Song o!
[OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] Deep impact (Cosmic Baton Girl Comet-san)
(Mimiket 3) [OVACAS (Hirokawa Kouichirou)] Zoids Tanekentai Born Free (ZOIDS)
(C52) [Raimusha (Various)] Ebisu Taisen Kanzenban (Sakura Taisen)
(Futaket vs. ABC ~Hentaisai~) [OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia (Manabi Straight!) [English] [biribiri]
(Puniket 12) [OVACAS (Hirokawa Kouichirou)] Sensei dazo! (Pani Poni)
(Puniket 9) [Marchen Box (Various)] Two Toned Romps (Pretty Cure)
(C55) [OVACAS (Various)] Heppoko Anime Chinpure Koupure (Various)
Men's Dolphin 1999-11-01 Vol.03
(C82) [OVACAS (Hirokawa Kouichirou)] Osaki mo Mae mo Marii-san. (Joshiraku)