Mariko appears (sings/talks) in the following miscellaneous CDs.

1995 07.21	Wrestle Angels Original Fighting Story (NACL-1184)	Talk
1996 08.21	Doukyuusei PC Engine Original Soundtrack (NACL-1227)	Talk
1997 01.21	McCow's Special "Ninki Seiyuu Vocal Shuu" (NACL-1271)	Song