(SC32) [OVACAS (Hirokawa Kouichirou)] another day (Ojamajo Doremi)
(CR33) [Okinawa Taieki Gunjinkai (Yasunaga Kouichirou)] Neko no Ishu-gaeshi (The Cat Returns)
(C65) [Okinawa Taieki Gunjinkai (Yasunaga Kouichirou)] Dokodemo♪ Friend (SEX FRIEND)
(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)
COMIC DOLPHIN 2004-06
(COMIC1☆3) [Okinawa Taieki Gunjinkai (Yasunaga Kouichirou)] Mega x Dora! (Toradora!)
(SC16) [Ovacas (Hirokawa Kouichirou)] Nichiyou Asa no 8-ji 30-bu (Ojamajo Doremi)
Senzo ha Hiaburi
[Hirokawa Kouichirou] PET LIFE
(C79) [Okinawa Taieki Gunjinkai (Yasunaga Kouichirou)] SNAKEY x MONKEY (Bakemonogatari)
(C63) [Okinawa Taieki Gunjinkai (Yasunaga Kouichirou)] Piano Lesson (The Big O) [English] [biribiri]
(CR32) [Okinawa Taieki Gunjinkai (Yasunaga Kouichirou)] Nagisa no Kedamono (MAID iN HEAVEN)
(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)
[Nanri Kouichirou] Saga Shitataru Shizuku
(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 EVENT EDITION (Various)
(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]
(C72) [GUNP (Mori Kouichirou, Sakura Akami)] Seven Star (Lucky Star)
(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)
Doujin Anthology Bishoujo Gumi 2
(C62) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 4 Sokuon (Azumanga-Daioh)
Haru Matsuri Chichi Matsuri 2010
(C62) [Knockout (Various)] Oshiri de Kyu! 7 (Various)
(C78) [OVACAS (Hirokawa Kouichirou)] Love Style Plus (Love Plus)
[Okinawa Taieki Gunjinkai (Yasunaga Kouichirou)] Tenkaichi dare ga Lum-chan da Taikai (Urusei Yatsura)
Magical? Banana
[Hirokawa Kouichirou] Deep Trip | 銷魂之旅 [Chinese]
(C82) [Okinawa Taieki Gunjinkai (Yasunaga Kouichirou)] Kamogawa Hyper Chargers (Rinne no Lagrange)
Tenshi ni Love Song o!
(C66) [INFINITY-FORCE (Mercy Rabbit)] VS∞ VURSUS INFINITY (Capcom vs. SNK)
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star)
Love Style
(CR36) [Okinawa Taieki Gunjinkai (Yasunaga Kouichirou)] Eroika. (Kaleido Star)
(CR29) [Okinawa Taieki Gunjinkai (Yasunaga Kouichirou)] Akuma ga Kitarite Koshi o Furu (Devilman) [Chinese] [超能汉化组]
(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)
(C69) [KNOCKOUT (Various)] Oshiri de Kyu! 9 (Various)
(C62) [KNOCKOUT (Various)] Oshiri de Kyu! 7 (Various)
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star) [English] [desudesu]
(SC12) [Kacchuu Musume) (Various)] Shiritsu Sangendou Gakuen Koubaibu 4 Gou
[Nanri Kouichirou] Ni Hatsume!! - Second Shot!!
(Suika Musume 3) [Ovacas (Hirokawa Kouichirou)] Asama de Training (Issho ni Training)
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star)
[Okinawa Taieki Gunjinkai(Yasunaga Kouichirou)] Chichi mo tsubasa mo horidashite
(SC23) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Precure Machine (Pretty Cure)