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

2011.10.19	Yuri Yura Rarara Yuru Yuri Housoushitsu Gakkouhen (OBC-111001)	Talk
2011.10.19	Yuri Yura Rarara Yuru Yuri Housoushitsu Umimbehen (OBC-111002)	Talk
2011.12.21	Yuru Yuri bluray vol.4 Special Sound CD (PCXG-50124)	Talk
2012.01.18	Yuru Yuri bluray vol.5 Special Sound CD (PCXG-50125)	Song
2012.02.15	Yuru Yuri bluray vol.6 Special Sound CD (PCXG-50126)	Song
2013.04.17	Twinkle Voice -Koe no Okurimono (UMCA-10015)	Song
2014.10.01	Momokyun Sword Vocal Album (VTCL-60380)	Song
2017.03.24	Yuyushiki OVA Character Song Album (GNCA-1493)	Song
2021.07.21	Yuru Yuri Gorakubu Best Album Special Edition (PCCG-2027)	Song
2021.07.21	Yuru Yuri Gorakubu Best Album Special Edition Canime Genteiban (SCCG-0076)	Song

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

2011.07.20	My Pace de Ikimashou (PCCG-70120)	Song
2011.07.20	Yuri Yurararara Yuru Yuri Daijiken (PCCG-01197)	Song
2011.09.07	Marugoto! (PCCG-70124)	Song
2012.01.25	Loop [Yayuyu] (FVCG-1189)	Song
2012.04.18	Te wo Gyu Shitene (PCCG-70135)	Song
2012.06.06	Sengku Collection Vol.1 (UMCA-50017)	Song
2012.07.04	100% Chu-Gakusei (PCCG-70138)	Song
2012.07.04	Yes! Yuyuyu Yuru Yuri (PCCG-01280)	Song
2012.07.18	Yuru Yuri!! Music 02 (PCCG-70142)	Song
2012.09.19	Oda Nobuna no Yabou Utahime 04 (PCCG-70154)	Song
2014.08.20	Pitty Patty Survibird (LACM-14266)	Song
2014.08.20	Ready Go!! (VTZL-86)	Song
2014.10.01	Sabagebu! Character Song 3 Kasugano Urara (LACM-14283)	Song/Talk
2014.10.22	Sabagebu! Character Song 5 Goutokuji Kayo (LACM-14285)	Song
2016.05.25	Eyes on Me (EYCA-10947)	Song
2017.02.08	Kirameki no Hi (GNCA-0443)	Song
2017.08.23	Gamers (GNCA-0499)	Song