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

2014.04.30	The Idolm@ster Cinderella Master 029 (COCC-16880)	Song
2017.01.25	Viewing Revolution Yes! Party Time! (COCC-17261)	Song
2017.02.08	Evermore (COCC-17282)	Song
2017.03.01	Cinderella Girls Starlight Master 09 (COCC-17149)	Song
2017.05.31	Cinderella Girls Starlight Master 11 Ankira!? Kyousoukyoku (COCC-17151)	Song
2017.08.09	Cinderella Girls Starlight Master 12 Inochi Moyashite Koiseyo Otome (COCC-17152)	Song
2017.09.20	Princess Connect Re:Dive Priconne Character Song 01 (COCC-17361)	Song/Talk
2018.03.14	Cinderella Girls Starlight Master 15 Sakura no Koro (COCC-17155)	Song
2018.03.28	Princess Connect Re:Dive Priconne Character Song 02 (COCC-17362)	Song/Talk
2019.02.13	Colorful Passage (TECI-654)	Song
2019.02.20	Cinderella Girls Starlight Master 26 (COCC-17516)	Song
2019.05.15	Returner Butterfly (TECI-673)	Song
2020.02.19	Cinderella Master 3chord for the Dance (COCC-17694)	Song
2020.03.25	Princess Connect Re:Dive Priconne Character Song 13 (COCC-17673)	Song
2020.04.29	Soredemo Tomoni Aruiteku (COCC-17763)	Song
2020.05.27	Princess Connect Re:Dive Priconne Character Song 15 (COCC-17675)	Song/Talk
2021.04.07	Cinderella Girls Starlight Master Gold Rush! 07 (COCC-17837)	Song
2021.12.08	Cinderella Girls Starlight Master Gold Rush! 13 (COCC-17843)	Song
2022.02.16	Tabidachi no Kisetsu (COCC-17968)	Song
2022.03.30	Princess Connect Re:Dive Priconne Character Song 26 (COCC-17896)	Song
2023.03.29	Cinderella Girls Starlight Master R/Lock On! 14 (COCC-17984)	Song
2023.07.26	Princess Connect Re:Dive Priconne Character Song 34 (COCC-18139)	Song
2023.11.29	Princess Connect Re:Dive Priconne Character Song 36 (COCC-18075)	Song
2024.09.11	Cinderella Girls Starlight Master Heart Ticker 09 (COCC-18179)	Song