(Puniket 12) [OVACAS (Hirokawa Kouichirou)] Sensei dazo! (Pani Poni Dash!)
(CT20) [OVACAS (Hirokawa Kouichirou)] Bouhatei no Onna. (Joshiraku)
[Anthology] Aokan Special
[Hirokawa Kouichirou] PET LIFE
(SC32) [OVACAS (Hirokawa Kouichirou)] another day (Ojamajo Doremi)
[ANTHOLOGY] Meganekko Deluxe
Otonano Omochiya 12 Futaba no Ohanashi Matome 2
COMIC Penguinclub Sanzokuban 2003-01
Pachie-bon
(C71) [OVACAS (Hirokawa Kouichirou)] BITCH STYLE (WITCHBLADE) [English] [desudesu]
(C78) [OVACAS (Hirokawa Kouichirou)] Love Style Plus (Love Plus) [English] [shakuganexa]
Men's Dolphin 1999-11-01 Vol.03
(C82) [OVACAS (Hirokawa Kouichirou)] Osaki mo Mae mo Marii-san. (Joshiraku)
(C78) [Shuudan Bouryoku (Various)] Hooliganism 17 Record of ALDELAYD Act.12 Exhibition DX9
(C61) [OVACAS (Hirokawa Kouichirou)] S.F.3.D (Various)
COMIC Penguin Club Sanzokuban 2000-09
(C66) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 5 (Pretty Cure)
[Anthology] Love Chara Taizen No. 6
(C70) [OVACAS (Hirokawa Kouichirou)] Magical? Banana (Renkin 3-kyuu Magical? Pokaan)
(C56) [Doudan Tsutsuji (Doudantsutsuji, Hirokawa Tomo)] Getten! (Mamotte Shugogetten)
(C70) [Knockout, Nikomark (Various)] Chougokubuto | Super Gokubuto (Various)
(Futaket vs. ABC ~Hentaisai~) [OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia (Manabi Straight!)
(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)
(Puniket 9) [Marchen Box (Various)] Two Toned Romps (Pretty Cure)
Otonano Omochiya 6 Kan
(Puniket 21) [Hirokaworld (Hirokawa)] Kojikabon Plus (Kodomo no Jikan)
(C66) [INFINITY-FORCE (Various)] VS∞ VURSUS INFINITY (Capcom vs. SNK)
[Hirokawa Kouichirou] Deep Trip
(C55) [OVACAS (Various)] Heppoko Anime Chinpure Koupure (Various)
(C81) [Manchin Sakura (COSiNE ,Erect Sawaru and more) Chun-li san to COSiNE ni Shuu Shuunen Kinen Hon (Street Fighter)
Otonano Omochiya 17
(CR36) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Iron Maiden (Genshiken, Kujibiki Unbalance)
COMIC Penguin Club Sanzokuban 2001-08 [Incomplete]
(Mimiket 3) [OVACAS (Hirokawa Kouichirou)] Zoids Tanekentai Born Free (ZOIDS)
[Hirokaworld (Hirokawa)] petta
[Anthology] Love Chara Taizen No. 7 (Various)
COMIC Penguinclub Sanzokuban 2002-10
(SC23) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Precure Machine (Pretty Cure)
[Hirokawa Kouichirou] A to Z
(SC19) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Rotation (Gundam SEED)
(C64) [KNOCKOUT (Various)] Oshiri de Kyu! 8 (Various)
[Hirokaworld (Hirokawa)] Neko Ebon Plus
(Puniket 11) [Hirokaworld (Hirokawa)] Pachie-bon (3-nen B-gumi Kinpachi Sensei Densetsu no Kyoudan ni tate!)
[Otonano Omochiya (Hirokawa)] Otonano Omochiya 3 Kan
Two Toned Romps
(C69) [KNOCKOUT (Various)] Oshiri de Kyu! 9 (Various)
[Hirokawa Tomo] Fresh Meat! [Chinese]
Otonano Omochiya 12 Futaba no Ohanashi Matome 12
[Shuudan Bouryoku (集団暴力)] HOOLIGANISM File/10 RECORD OF ALDELAYD ExhibitionDX2
After School XX Time
(C61) [Dangan Densetsu (Hirokawa Tomo)] Kirakira no Haru (AIR, Kanon)
(Tougetsu-sai) [OVACAS (Hirokawa Kouichirou)] IYASI-K (Pani Poni)
(C68) [OVACAS (Hirokawa Kouichirou)] MAI-CCHING (Mai-HiME)
(C78) [Shuudan Bouryoku (Murasaki Syu)] Hooliganism 17 Record of ALDELAYD Act.12 Exhibition DX9 (English) =LWB=
COMIC Penguinclub Sanzokuban 2003-12
(Futaket vs. ABC ~Hentaisai~) [OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia (Manabi Straight!) [English] [biribiri]
(C64) [Abellcain (Fujimaru Arikui)] Lucky Come Come (Kujibiki Unbalance)
(C74) [OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] S.M.S Niyoukoso! (Macross Frontier)
(Puniket 12) [OVACAS (Hirokawa Kouichirou)] Sensei dazo! (Pani Poni)
(C66) [INFINITY-FORCE (Mercy Rabbit)] VS∞ VURSUS INFINITY (Capcom vs. SNK)
(C65) [Infinity-Force (Various)] BL Are Go!! (Machine Robo Rescue)
(C74) [Hirokaworld (Hirokawa)] Akiratama (Lucky☆Star)
(SC27) [Hirokaworld (Hirokawa)] 15/21 (3-nen B-gumi Kinpachi Sensei Densetsu no Kyoudan ni tate!)
KupaaBon 3
(C64) [Infinity-Force (Mercy Rabbit, Rokujou Mugi, Buruma Hogero, Hirokawa Kouichirou, Yamashita Woory)] MRR A GO!! (Machine Robo Rescue)
COMIC Penguinclub Sanzokuban 2003-08
Otonano Omochiya 6 Kan Ch. 1
(Comic Castle Final) [Nipopo Crisis, OVACAS (Genka Ichien, Hirokawa Kouichirou) Patsukin Dynamite HEAVEN (Bakusou Kyoudai Lets & Go!!)
(C73) [OVACAS (Hirokawa Kouichirou)] Banchou Densetsu (Minami-ke)
(C63) [OVACAS (Hirokawa Kouichirou)] Shirobom (Bomberman Jetters)
Otonano Omochiya Vol. 14
Love Style
(CSP4) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri (School Rumble, Mai-HiME)
(C67) [OVACAS (Hirokawa Kouichirou)] HIME-Hajime (My-HiME)
(C99) [Otonano Omochiya (Hirokawa)] Otonano Omochiya 17 [Chinese]
Otonano Omochiya Vol. 15
Capricon I - Director's Cut
(C62) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 4 Sokuon (Azumanga-Daioh)
(C54) [OVACAS (Various)] Capricon 1 Director's Cut (Various)
(C68) [OVACAS (Hirokawa Kouichirou)] MAI-CCHING (Mai-HiME) [English] [SaHa]
Otonano Omochiya Vol. 1-14
[Hirokawa Tomo] Puripanyu Z
[Shuudan Bouryoku (Murasaki Syu)] Takanashi-san-chi no 4 Shimai - 1 (WORKING!!)
(Puniket 6) [OVACAS (Hirokawa Kouichirou)] AxA (Ojamajo Doremi)
(C80) [OVACAS (Hirokawa Kouichirou)] A STYLE. (A Channel)
(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 (Various)
[Amadeus No Isan] Rapid Game {To Heart 2}
(C79) [OVACAS (Hirokawa Kouichirou)] Tenshi(Bitch) ni Love Song o! (Panty & Stocking with Garterbelt)
(C69) [OVACAS (Hirokawa Kouichirou)] 1-NEN C-GUMI MAHOGUMI (Pani Poni)
(CR35) [Abellcain (Fujimaru Arikui)] KALEIDOSCOPE (Kaleidostar)
(C57) [OVACAS (Hirokawa Kouichirou)] Doremix Deluxe (Ojamajo Doremi)
Otonano Omochiya Vol. 16
Otonano Omochiya Vol. 13
(CR27) [Dangan Densetsu Laser (Hirokawa Tomo, Nerima Yoshito)] Kairaku Gensoku Hagurumashiki Soutei Souchi (Revolutionary Girl Utena)
(C90) [Hooliganism (Murasaki Syu, Hirokawa Kouichirou)] Kono Subarashii Demi-chan no Demi Sauce! (Demi-chan wa Kataritai, Kono Subarashii Sekai ni Syukufuku o!)
[Hirokaworld (Hirokawa)] Shiikibi (Various) [Digital]
COMIC Penguin Club Sanzokuban 2001-06
COMIC Penguin Club Sanzokuban 2001-04
(COMIC1) [OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] Itazura Drill (Tengen Toppa Gurren Lagann)
(C77) [OVACAS (Hirokawa Kouichirou)] Love Style (Love Plus)
(C75) [Ovacas (Hirokawa Kouichirou)] Ovacas Style 2008 (Kannagi, Queen's Blade, Strike Witches)
Hungar x Hungar One Pause (Hunter x Hunter One Piece)
[INFINITY-FORCE (Various)] Digitama 04 FRONTIER (Digimon Tamers, Digimon Frontier)
(C56) [OVACAS (Various)] Dore Mix (Ojamajo Doremi)
Otonano Omochiya Vol.6 - Ch.4
[Hirokawa Tomo] Fresh Meat!
Kono subarashī Amahito-chan no demisōsu!
[COMIC] Penguinclub Sanzokuban 2003-02
(ABC 5) [OVACAS (Hirokawa Kouichirou)] Iro Iro Gal and Dou (Various)
[Otonano Omochiya (Hirokawa)] Otonano Omochiya Vol. 14 [English] [ChoriScans]
(C84) [OVACAS (Hirokawa Kouichirou)] Kedamono-tachi no YAMATO. (Space Battleship Yamato 2199)
(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 EVENT EDITION (Various)
[OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia Kaiteiban (Manabi Straight!)
COMIC Penguinclub Sanzokuban 2003-11
(C67) [OVACAS (Hirokawa Kouichirou)] HIME-hajimeru (My-HiME) [English] [SaHa]
Tenshi ni Love Song o!
(C62) [KNOCKOUT (Various)] Oshiri de Kyu! 7 (Various)
(C60) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 3 (Various)