(C61) [OVACAS (Hirokawa Kouichirou)] S.F.3.D (Various)
(CSP4) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri (School Rumble, Mai-HiME)
(C57) [OVACAS (Hirokawa Kouichirou)] Doremix Deluxe (Ojamajo Doremi)
(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 EVENT EDITION (Various)
(C67) [OVACAS (Hirokawa Kouichirou)] HIME-hajimeru (My-HiME) [English] [SaHa]
(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)
(C60) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 3 (Various)
(C73) [OVACAS (Hirokawa Kouichirou)] Banchou Densetsu (Minami-ke)
(C56) [OVACAS (Various)] Dore Mix (Ojamajo Doremi)
(C67) [OVACAS (Hirokawa Kouichirou)] HIME-Hajime (My-HiME)