After School XX Time
(COMIC1☆2) [OVACAS (Hirokawa Kouichirou)] Kurobeta (Minami-ke)
(C99) [Otonano Omochiya (Hirokawa)] Otonano Omochiya 17 [Chinese]
(C60) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 3 (Various)
(Comic Castle 2005) [Abellcain (Fujimaru Arikui)] EUREKA FIGHT (Eureka seveN)
(C55) [OVACAS (Various)] Heppoko Anime Chinpure Koupure (Various)
Otonano Omochiya 6 Kan
Kono subarashī Amahito-chan no demisōsu!
(C54) [OVACAS (Various)] Capricon 1 Director's Cut (Various)
(C63) [OVACAS (Hirokawa Kouichirou)] Shirobom (Bomberman Jetters)
(Puniket 19) [Hirokaworld (Hirokawa)] Shiikibi (Various)
(Futaket vs. ABC ~Hentaisai~) [OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia (Manabi Straight!)
(C66) [Shuudan Bouryoku (Various)] File/12 Record of Aldelayd - EXHIBITION DX4
[Hirokawa Kouichirou] PET LIFE
[Otonano Omochiya (Hirokawa,Yukito)] Otonano Omochiya Vol.13 [English][ChoriScans]
(C65) [Infinity-Force (Various)] BL Are Go!! (Machine Robo Rescue)
(C76) [OVACAS (Hirokawa Kouichirou)] Asamade Training (Issho ni Training)
(C81) [Manchin Sakura (COSiNE ,Erect Sawaru and more) Chun-li san to COSiNE ni Shuu Shuunen Kinen Hon (Street Fighter)
(Puniket 9) [Hirokaworld (Hirokawa)] Nyaa Hon
(Mimiket 3) [OVACAS (Hirokawa Kouichirou)] Zoids Tanekentai Born Free (ZOIDS)
Men's Dolphin 1999-11-01 Vol.03
(C64) [KNOCKOUT (Various)] Oshiri de Kyu! 8 (Various)
[OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia Kaiteiban (Manabi Straight!)
Otonano Omochiya 12 Futaba no Ohanashi Matome 12
(C77) [OVACAS (Hirokawa Kouichirou)] Love Style (Love Plus)
[Otonano Omochiya (Hirokawa)] Otonano Omochiya 3 Kan
Otonano Omochiya Vol. 13
COMIC Penguin Club Sanzokuban 2001-04
COMIC Penguinclub Sanzokuban 2003-01
(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 EVENT EDITION (Various)
Otonano Omochiya Vol. 16
(SC23) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Precure Machine (Futari wa Precure)
Ovacas Style 2008
Comic Sigma Volume 1
Otonano Omochiya 17
(C74) [Hirokaworld (Hirokawa)] Akiratama (Lucky☆Star)
[Amatoro Bow] Hanarete Ite mo Hito ni Fureru Otoko
大人のおもちや3巻
(C62) [Knockout (Various)] Oshiri de Kyu! 7 (Various)
(C90) [Hooliganism (Murasaki Syu, Hirokawa Kouichirou)] Kono Subarashii Demi-chan no Demi Sauce! (Demi-chan wa Kataritai, Kono Subarashii Sekai ni Syukufuku o!)
Otonano Omochiya Vol. 14
(C80) [OVACAS (Hirokawa Kouichirou)] A STYLE. (A Channel)
(C62) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 4 Sokuon (Azumanga-Daioh)
(C56) [OVACAS (Various)] Dore Mix (Ojamajo Doremi)
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star)
(C69) [OVACAS (Hirokawa Kouichirou)] 1-NEN C-GUMI MAHOGUMI (Pani Poni)
KupaaBon 3
(Puniket 11) [Hirokaworld (Hirokawa)] Pachie-bon (3-nen B-gumi Kinpachi Sensei Densetsu no Kyoudan ni tate!)
(C73) [OVACAS (Hirokawa Kouichirou)] Banchou Densetsu (Minami-ke)
(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)
(SC27) [Hirokaworld (Hirokawa)] 15/21 (3-nen B-gumi Kinpachi Sensei Densetsu no Kyoudan ni tate!)
(C66) [INFINITY-FORCE (Mercy Rabbit)] VS∞ VURSUS INFINITY (Capcom vs. SNK)
Otonano Omochiya Vol.6 - Ch.4
(C78) [OVACAS (Hirokawa Kouichirou)] Love Style Plus (Love Plus) [English] [shakuganexa]
COMIC Penguin Club Sanzokuban 2001-08 [Incomplete]
[Dangan Densetsu (Hirokawa Tomo)] Fairy Shape (Final Fantasy VIII)
COMIC Penguinclub Sanzokuban 2003-08
(C70) [OVACAS (Hirokawa Kouichirou)] Magical? Banana (Renkin 3-kyuu Magical? Pokaan)
[Otonano Omochiya (Hirokawa)] Otonano Omochiya Vol. 16 [Chinese]
Otonano Omochiya Vol.6 - Ch.4-5
[Hirokaworld (Hirokawa)] petta
[Otonano Omochiya (Hirokawa)] Otonano Omochiya Vol. 14 [English] [ChoriScans]
(C84) [OVACAS (Hirokawa Kouichirou)] Kedamono-tachi no YAMATO. (Space Battleship Yamato 2199)