Groups
- roji koubou 13
- route885 13
- rugarer-house 13
- ruri ringo 13
- ryuusen 13
- s plus y 13
- saidamin 13
- sakuragashi 13
- same koubou 13
- sanb. 13
- sanryuu kaigishitsu 13
- sarasara canvas 13
- sasaki maru 13
- seacloud 13
- seamanz 13
- seven sea star 13
- sevens magajin 13
- sf-l 13
- shan maryland 13
- sharp define 13
- shichishinkan 13
- shihachirou 13
- shimobashira koubou 13
- shirasu an 13
- shishamotei 13
- shisshin chuudoku 13
- silent hill 13
- silky to yukai na nakama-tachi 13
- silver rice 13
- soft thigh 13
- soloistick 13
- sora no gomibako 13
- sorciere 13
- spangle opera 13
- spnati 13
- springlove 13
- squall 13
- state of see 13
- still 13
- studio charen 13
- studio hatake 13
- studio momiji 13
- studio oppai 13
- studio snow man 13
- suishoku sendan 13
- sukebe hatsudenjo 13
- t-e kikaku 13
- tachimukau 13
- tairyo-tei 13
- takeuma no tomo 13