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

2005.12.21	Boku Fecchi (LACA-5464)	Talk
2005.12.21	My Saint -Itsudatte My Santa! BGM + Charasong Remix (YFCA-1703)	Song
2005.12.23	Galaxy Angel II & I Duet CD 4 (BRCF-3059)	Song
2005.12.23	Galaxy Angel II and I Duet CD 4 (BRCF-3059)	Song/Talk
2006.07.05	SOS Dan Radio Shibu Bangaihen 1 (LACA-5523)	Talk
2006.09.21	SOS Dan Radio Shibu Bangaihen 2 (LACA-5556)	Talk
2006.12.21	SOS Dan Radio Shibu Bangaihen 3 (LACA-5584)	Talk
2007.01.24	Suzumiya Haruhi no Yuuutsu Drama CD Sound Around (LACA-5585)	Song/Talk
2007.02.21	Manabi Straight Original Soundtrack Ensemble I (KICA-831)	Song
2007.04.04	Manabi Straight Kira Kira Happy Festa! (KICA-839)	Song
2007.05.16	Manabi Straight Original Soundtrack Ensemble II (KICA-851)	Song
2007.07.11	Lucky Star Ending Theme Shuu -Aru Hi no Karoke Box- (LACA-5658)	Song
2007.08.08	Motteke! Sailor Fuku Re-Mix001 (LACM-4402)	Song
2007.11.23	Sweet Winter (BRCA-1083)	Song
2008.01.23	Sekai ga Yumemiru Yume no Naka (LACA-5728)	Song
2009.01.20	Suzumiya Haruhi no Gekidou Vocal Album (LACA-5830)	Song
2009.03.25	Akane iro ni Somaru Saka Original Drama (LACA-5867)	Talk
2009.03.25	Suzumiya Haruhi no Chokuretsu&Heiretsu Vocal Mini Album (LACA-5883)	Song
2009.06.03	Macross F Nyan Dra 3 (VTCL-60104)	Talk
2009.06.24	Suzumiya Haruhi no Gensou (LACA-5920)	Song
2009.07.08	Macross F Nyan Dra 4 (VTCL-60105)	Talk
2010.01.27	Fight Ippatsu! Juuden-chan! Mini Album (AVCA-29489)	Song
2010.01.27	White Album Sound Stage 01 (KICA-2501)	Talk
2010.02.24	Koi no Qwaser Magic (LACA-15014)	Song
2010.02.24	White Album Sound Stage 02 (KICA-2502)	Song/Talk
2010.03.24	White Album Character Song Best & Sound Track (KICA-2505 KICA-2506)	Song
2010.03.25	Queen's Blade Vocal Collection (ZMCZ-4660)	Song
2012.05.16	Kizuna Daro!! (PCCG-01220)	Song
2012.05.23	Aquaplus Vocal Collection Vol.8 (KIGA-13)	Song
2013.06.26	Ambitious (GNCA-1359)	Song