(SC32) [OVACAS (Hirokawa Kouichirou)] another day (Ojamajo Doremi)
Hungar x Hungar One Pause (Hunter x Hunter One Piece)
Otonano Omochiya Vol. 15
(SC23) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Precure Machine (Futari wa Precure)
[Shuudan Bouryoku (Murasaki Syu)] Takanashi-san-chi no 4 Shimai - 1 (WORKING!!)
(C76) [OVACAS (Hirokawa Kouichirou)] Asamade Training (Issho ni Training)
(SC16) [Ovacas (Hirokawa Kouichirou)] Nichiyou Asa no 8-ji 30-bu (Ojamajo Doremi)
COMIC Penguin Club Sanzokuban 2001-06
[Hirokawa Kouichirou] PET LIFE
(C68) [OVACAS (Hirokawa Kouichirou)] MAI-CCHING (Mai-HiME)
(C74) [OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] S.M.S Niyoukoso! (Macross Frontier)
(C83) [OVACAS (Hirokawa Kouichirou)] Buratei Heart. (Joshiraku)
(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 EVENT EDITION (Various)
Otonano Omochiya 6 Kan Ch. 1
(C70) [OVACAS (Hirokawa Kouichirou)] Magical? Banana (Renkin 3-kyuu Magical? Pokaan)
Two Toned Romps
[Amadeus No Isan] Rapid Game {To Heart 2}
(C77) [OVACAS (Hirokawa Kouichirou)] Love Style (Love Plus)
(Futaket vs. ABC ~Hentaisai~) [OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia (Manabi Straight!) [English] [biribiri]
(C76) [OVACAS (Hirokawa Kouichirou)] Houkago XX Time | After School XX Time (K-ON!) [English] [Darknight]
(Puniket 12) [OVACAS (Hirokawa Kouichirou)] Sensei dazo! (Pani Poni)
(C64) [KNOCKOUT (Various)] Oshiri de Kyu! 8 (Various)
(SC19) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Rotation (Gundam SEED)
[Hirokawa Tomo] Cherry Concerto
(C62) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 4 Sokuon (Azumanga-Daioh)
Haru Matsuri Chichi Matsuri 2010
(C62) [Knockout (Various)] Oshiri de Kyu! 7 (Various)
[Hirokaworld (Hirokawa)] Shiikibi (Various) [Digital]
[Hirokawa Tomo] Fresh Meat!
Otonano Omochiya 6 Kan
(C78) [OVACAS (Hirokawa Kouichirou)] Love Style Plus (Love Plus)
Otonano Omochiya Vol.6 - Ch.4-5
Magical? Banana
[Hirokawa Kouichirou] Deep Trip | 銷魂之旅 [Chinese]
Tenshi ni Love Song o!
(C66) [INFINITY-FORCE (Mercy Rabbit)] VS∞ VURSUS INFINITY (Capcom vs. SNK)
COMIC Penguinclub Sanzokuban 2002-12
(C51) [Hiasobi Club (Fumizuki Kou)] NO BRAND LONELY WINTER
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star)
Love Style
(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)
(C69) [KNOCKOUT (Various)] Oshiri de Kyu! 9 (Various)
(C62) [KNOCKOUT (Various)] Oshiri de Kyu! 7 (Various)
[Anthology] Love Chara Taizen No. 7 (Various)
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star) [English] [desudesu]
Otonano Omochiya Vol. 1-14
(C61) [Dangan Densetsu (Hirokawa Tomo)] Kirakira no Haru (AIR, Kanon)
Otonano Omochiya 12 Futaba no Ohanashi Matome 2
(Suika Musume 3) [Ovacas (Hirokawa Kouichirou)] Asama de Training (Issho ni Training)
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star)
COMIC Penguinclub Sanzokuban 2002-10
(SC23) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Precure Machine (Pretty Cure)
(C66) [Shuudan Bouryoku (Various)] File/12 Record of Aldelayd - EXHIBITION DX4
COMIC Penguinclub Sanzokuban 2003-01