Aya appears (sings/talks) in the following CD singles.

2005 10.21	Itsudatte My Santa! Character Song 1 (YFCM-2701)	Song
2006 03.08	Break Through (LACM-4251)	Song
2006 04.26	Bouken desho desho? (LACM-4255)	Song
2006 05.10	Hare Hare Yukai (LACM-4261)	Song
2006 06.21	Suzumiya Haruhi no Tsumeawase (LACM-4268)	Song
2006 07.05	Character Song vol. 1 Haruhi Suzumiya (LACM-4269)	Song
2006 09.06	Ashita no Prism (LACM-4292)	Song
2006 10.25	Uchuu de Koi ha Rurun Rune (LACM-4300)	Song
2006 11.22	Saikyou Pare Parade (LACM-4316)	Song
2006 12.21	Manabi Straight Character Mini Album Etou Mei (KICA-802)	Song
2007 05.23	Motteke! Sailor Fuku (LACM-4362)	Song
2007 08.29	Kosutte! Oh My Honey (LACM-4398)	Song
2007 09.05	Lucky Star Character Song vol 001 (LACM-4404)	Song
2007 10.10	Love Gun (LACM-4417)	Song
2007 10.10	Manabi Straight VII DVD+CD (KIBA-91393)	Song
2007 10.31	Lucky Star Character Song vol 010 (LACM-4425)	Song
2007 11.07	Neophilia (LACM-4430)	Song
2007 12.05	MonStAR (LACM-4436)	Song
2008 03.05	Hamatte Sabotte Oh My God! (LACM-4465)	Song
2008 04.23	Unnamed World (LACM-4485)	Song
2008 05.28	Zettai Love x Love Sengen! (GNCA-0105)	Song
2008 07.23	Zettai Karen Children Character CD 1st Session (GNCA-0091)	Song
2008 07.23	Zettai Karen Children Character CD 4th Session (GNCA-0094)	Talk
2008 09.24	Datte Daihonmei (GNCA-0106)	Song
2008 09.24	Memories Off 6 Personal Collection 2 (FVCG-1052)	Song
2008 10.08	Namida Namida Namida (LACM-4531)	Song
2008 12.25	Nagase Minato (LACM-4548)	Song
2009 02.25	Soushunfu (GNCA-0108)	Song
2009 04.01	White Album Character Song 1 Morikawa Yuki (KICM-3188)	Song
2009 04.22	Imamade no Arasuji (LACM-4610)	Song
2009 04.22	Omoide to Yakusoku (ZMCZ-4612)	Song
2009 04.22	Set Me Free (LACM-34609)	Song
2009 06.24	Kono Sumochi kara no Sotsugyou (LCM-4624)	Guest
2009 07.22	Super Driver (LACM-4631)	Song
2009 08.25	Queen's Blade Character Song Nanael (ZMCZ-4623)	Song/Talk
2009 08.26	Tomare! (LACM-4640)	Song
2009 09.30	New Character Song Vol.1 Suzumiya Haruhi (LACM-4650)	Song
2009 10.28	Elec Trick (AVCA-29378)	Song
2010 01.01	Koiiro Sora (KICM-3196)	Song
2010 01.27	Na-Ri-A-Ga-Ri (LACM-4688)	Song
2010 02.10	Passionate Squall (LACM-4685)	Song
2010 05.12	Wishes Hypocrites (LACM-4718)	Song
2010 06.23	Hysteric Barbie (LACM-34700)	Song
2010 07.28	Seventh Heaven (GNCA-0199)	Song
2010 08.18	Sparky Start [Katate Size] (PCCG-70067)	Song
2010 11.17	Symphonic Dream [Katate Size] (PCCG-70068)	Song
2011 07.27	Orange Smile [Katate Size] (PCCG-70117)	Song
2011 10.26	Departure [Katate Size] (PCCG-70118)	Song
2013 02.20	TOxxxIC (UMCK-9613)	Song
2013 10.09	Promise (UMCK-9633)	Song
2015 04.29	Fure Fure Mirai (LACM-14342)	Song
2015 07.22	Nagato Yuki-chan no Shoushitsu Character Song Case 5 (LACM-14355)	Song