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

2009 04.22	Cagayake! Girls (PCCG-70036)	Song
2009 04.22	Don't Say Lazy (PCCG-70038)	Song
2009 05.20	Fuwa Fuwa Time (PCCG-70040)	Song
2009 06.17	K-ON! character image song series Akiyama Mio (PCCG-00982)	Song
2009 06.17	K-ON! character image song series Hirasawa Yui (PCCG-00981)	Background Vocals
2009 08.26	K-ON! character image song series Azusa Nakano (PCCG-00985)	Background Vocals
2009 08.26	K-ON! character image song series Ritsu Tainaka (PCCG-00983)	Background Vocals
2009 08.26	K-ON! character image song series Tsumugi Kotobuki (PCCG-00984)	Background Vocals
2010 02.10	Choose Bright! (KICM-3199)	Song
2010 02.10	Passionate Squall (LACM-4685)	Song
2010 02.10	Shy Girls (KICM-3200)	Song
2010 03.10	Chuu Bra! Character Song Single Amahara Kiyono (KICM-3206)	Song
2010 04.28	Go! Go! Maniac (PCCG-70071)	Song
2010 04.28	Listen! (PCCG-70073)	Song
2010 05.12	Wishes Hypocrites (LACM-4718)	Song
2010 06.02	Pure Pure Heart (PCCG-70075)	Song
2010 07.21	Yamato Nadeshiko Education (KICM-3211)	Song
2010 08.04	No Thank You! (PCCG-70079)	Song
2010 08.04	Utauyo! Miracle (PCCG-70077)	Song
2010 09.08	Gohan ha Okazu (PCCG-70081)	Song
2010 09.21	K-ON!! Character Image Song Mio Akiyama (PCCG-01066)	Song
2010 09.21	K-ON!! Character Image Song Yui Hirasawa (PCCG-01065)	Background vocals
2010 11.17	K-ON!! Character Image Song Azusa Nakano (PCCG-01069)	Background vocals
2010 11.17	K-ON!! Character Image Song Ritsu Tainaka (PCCG-01067)	Background vocals
2010 11.17	K-ON!! Character Image Song Tsumugi Kotobuki (PCCG-01068)	Background vocals
2011 01.26	Sekai to Issho ni Mawarouyo (KECH-9008)	Song
2011 01.26	Sekai to Issho ni Mawarouyo (KECH-9009)	Song
2011 02.16	Super Stream (LACM-4780)	Song
2011 04.20	Ichidokiri no Love Story (AVCA-29891)	Song
2011 08.17	Shoot! (WB-1000232057)	Song
2011 09.07	Can Peki Shinakya! (WB-1000232060)	Song/Talk
2011 12.07	Singing (PCCG-70084)	Song
2011 12.07	Unmei ha Endless (PCCG-70082)	Song
2013 06.05	Owaranai Uta (PCCG-1344)	Song
2013 07.10	Get Goal (WB-1000412330)	Song
2013 07.17	Symphogear G Character Song 1 (KICM-3257)	Song
2013 07.31	RouKyuuBu! SS Character Songs 03 (WB-1000412643)	Song/Talk
2013 08.07	Symphogear G Character Song 3 (KICM-3259)	Song
2014 02.12	EX Futurize (PCCG-70201)	Song
2014 03.05	Coloration (LALM-4005)	Song
2014 05.21	Oracion (ZMCZ-9308)	Song
2015 09.09	Symphogear GX Character Song 7 (KICM-3300)	Song
2017 07.12	Symphogear AXZ Character Song 2 (KICM-3323)	Song
2017 08.23	New Game Character Song CD Series Vocal Stage 1 (ZMCZ-11301)	Song
2017 09.06	That Is How I Roll (BRMM-10097)	Song
2018 01.31	Hey Day Capriccio (BRMM-10107)	Song
2018 05.30	Princess Connect Re:Dive Priconne Character Song 03 (COCC-17363)	Song/Talk
2018 07.25	Princess Connect Re:Dive Priconne Character Song 04 (COCC-17364)	Song/Talk
2019 08.07	Symphogear XV Character Song 5 (KICM-3360)	Song
2020 04.29	Princess Connect Re:Dive Priconne Character Song 14 (COCC-17674)	Song/Talk
2021 09.29	Princess Connect Re:Dive Priconne Character Song 23 (COCC-17893)	Song
2022 02.16	Tabidachi no Kisetsu (COCC-17968)	Song