(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 EVENT EDITION (Various) (CSP5) [OVACAS (広川浩一郎)] 春まつり乳まつり2010 EVENT EDITION (よろず)

(C67) [OVACAS (Hirokawa Kouichirou)] HIME-Hajime (My-HiME)

(C67) [OVACAS (Hirokawa Kouichirou)] HIME-hajimeru (My-HiME) [English] [SaHa]

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

(C56) [OVACAS (Various)] Dore Mix (Ojamajo Doremi)

(C73) [OVACAS (Hirokawa Kouichirou)] Banchou Densetsu (Minami-ke)

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

(C60) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 3 (Various)

(C57) [OVACAS (Hirokawa Kouichirou)] Doremix Deluxe (Ojamajo Doremi)

(CSP4) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri (School Rumble, Mai-HiME)

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