[Otonano Omochiya (Hirokawa)] Otonano Omochiya 3 Kan

[Hirokaworld (Hirokawa)] Neko Ebon Plus

(C78) [OVACAS (Hirokawa Kouichirou)] Love Style Plus (Love Plus) [English] [shakuganexa]

(C75) [Ovacas (Hirokawa Kouichirou)] Ovacas Style 2008 (Kannagi, Queen's Blade, Strike Witches)

(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star)

(Puniket 19) [Hirokaworld (Hirokawa)] Shiikibi (Various)

[Hirokaworld (Hirokawa)] petta

[Hirokawa Tomo] Fresh Meat! [Chinese]

[Hirokawa Kouichirou] Deep Trip | 銷魂之旅 [Chinese]

(COMIC1☆2) [OVACAS (Hirokawa Kouichirou)] Kurobeta (Minami-ke)

[OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] Deep impact (Cosmic Baton Girl Comet-san)

(C83) [OVACAS (Hirokawa Kouichirou)] Buratei Heart. (Joshiraku)

(C80) [OVACAS (Hirokawa Kouichirou)] A STYLE. (A Channel)

(C81) [OVACAS (Hirokawa Kouichirou)] SUITE&BITCH (Suite Precure)

(C79) [OVACAS (Hirokawa Kouichirou)] Tenshi(Bitch) ni Love Song o! (Panty & Stocking with Garterbelt)

(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 (Various)

[Dangan Densetsu (Hirokawa Tomo)] Fairy Shape (Final Fantasy VIII)

(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star) [English] [desudesu]

(Puniket 9) [Hirokaworld (Hirokawa)] Nyaa Hon

(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 EVENT EDITION (Various)

(C62) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 4 Sokuon (Azumanga-Daioh)

[Hirokawa Tomo] Fresh Meat!

(Comic Castle Final) [Nipopo Crisis, OVACAS (Genka Ichien, Hirokawa Kouichirou) Patsukin Dynamite HEAVEN (Bakusou Kyoudai Lets & Go!!)

(C63) [OVACAS (Hirokawa Kouichirou)] Shirobom (Bomberman Jetters)

(C76) [OVACAS (Hirokawa Kouichirou)] Asamade Training (Issho ni Training)

(C76) [OVACAS (Hirokawa Kouichirou)] Houkago XX Time (K-ON!)

(C76) [OVACAS (Hirokawa Kouichirou)] Houkago XX Time | After School XX Time (K-ON!) [English] [Darknight]

(C69) [OVACAS (Hirokawa Kouichirou)] 1-NEN C-GUMI MAHOGUMI (Pani Poni)

[Hirokaworld (Hirokawa)] Shiikibi (Various) [Digital]

(SC32) [OVACAS (Hirokawa Kouichirou)] another day (Ojamajo Doremi)

(Puniket 6) [OVACAS (Hirokawa Kouichirou)] AxA (Ojamajo Doremi)

(SC19) [Abellcain, OVACAS (Fujimaru Arikui, Hirokawa Kouichirou)] Rotation (Gundam SEED)

(C65) [OVACAS (Hirokawa Kouichirou)] FLOW MY TEARS A SENIOR SAID (Uchuu No Stellvia)

(C61) [OVACAS (Hirokawa Kouichirou)] S.F.3.D (Various)

(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)