Groups
- cecilia soft 6
- charm books 6
- charmy 6
- chavo bantam 6
- chayagai 6
- cheeky 6
- chi-ponkan 6
- chibi chibi neko neko 6
- chibupuru 6
- chicken lab 6
- chicory 6
- chigusaya 6
- chikashitsu project 6
- chikichikichikinchikin 6
- chikoku doumei 6
- chikuwa drop 6
- chikuwamome 6
- childmaid 6
- chimaroni 6
- chin soft 6
- chiyokoreito 6
- chococo 6
- chocolate pepper. 6
- chon 6
- circle epion 6
- circle lolipop 6
- circle mebius 6
- circle yaranaika 6
- clap 6
- climax 6
- clocklord 6
- closeranks 6
- clubmatt 6
- coa 6
- cocoatank 6
- color-staining 6
- coppo-otome 6
- court girl marin 6
- coya 6
- craftwork 6
- cranky-ya 6
- crayon48 6
- crazy crazy 6
- crown brigade 6
- crows dream 6
- crystal mermaid 6
- crystal shoujo 6
- cupi 6
- cyanos 6
- d.o. 6