Groups
- sakyu syogkun 15
- sasami no maruyaki 15
- sasha forest 15
- sayupot 15
- sbi 15
- seaweed 15
- seinendoumei 15
- seiun neopolis 15
- sente hisshou 15
- seraphita 15
- sesso minus 15
- setouchi mao no yamiichi 15
- shiny hypnotic 15
- shioyude 15
- shironoha 15
- shobocon 15
- shounen yuuichirou 15
- sigmart 15
- sinkirou 15
- sirisiri denbu club 15
- slave 15
- solala 15
- solid line 15
- st. different 15
- stripe orange 15
- studio hamachigumi 15
- studio koron 15
- studio n.ball 15
- studio room 15
- studio sushi kui-ne 15
- studiobind 15
- sudachic 15
- suiteibuin 15
- sukoburuyama 15
- sunatoka aoi noyama 15
- suzume no miya 15
- syangrila 15
- takamachi 15
- takemaruya 15
- takeo company 15
- tanbo 15
- tanima ginkou 15
- tarako koubou 15
- tatsuwa no sato 15
- technomics. 15
- teiesuya 15
- tendou kikaku 15
- terolin soft 15
- tetsu-sabi 15
- tetsuwan-comsou 15