(Puniket 6) [OVACAS (Hirokawa Kouichirou)] AxA (Ojamajo Doremi)
(C69) [OVACAS (Hirokawa Kouichirou)] 1-NEN C-GUMI MAHOGUMI (Pani Poni)
(Tougetsu-sai) [OVACAS (Hirokawa Kouichirou)] IYASI-K (Pani Poni)
(C78) [OVACAS (Hirokawa Kouichirou)] Love Style Plus (Love Plus) [English] [shakuganexa]
(C62) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 4 Sokuon (Azumanga-Daioh)
(Puniket 12) [OVACAS (Hirokawa Kouichirou)] Sensei dazo! (Pani Poni Dash!)
(C75) [Ovacas (Hirokawa Kouichirou)] Ovacas Style 2008 (Kannagi, Queen's Blade, Strike Witches)
(C66) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 5 (Pretty Cure)
(C60) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 3 (Various)
(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)