(C61) [OVACAS (Hirokawa Kouichirou)] S.F.3.D (Various)
(Puniket 12) [OVACAS (Hirokawa Kouichirou)] Sensei dazo! (Pani Poni Dash!)
AxA
(SC32) [OVACAS (Hirokawa Kouichirou)] another day (Ojamajo Doremi)
(Puniket 12) [OVACAS (Hirokawa Kouichirou)] Sensei dazo! (Pani Poni)
(SC16) [Ovacas (Hirokawa Kouichirou)] Nichiyou Asa no 8-ji 30-bu (Ojamajo Doremi)
(CR27) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH (Various)
[OVACAS (Hirokawa Kouichirou)] Kashi 1114 (Ojamajo Doremi)
(C57) [OVACAS (Hirokawa Kouichirou)] Doremix Deluxe (Ojamajo Doremi)
(C56) [OVACAS (Various)] Dore Mix (Ojamajo Doremi)