Groups
- loli chahan 31
- luft forst 31
- marosaan 31
- megabox 31
- meromero melon 31
- million bank 31
- mizone doubutsuen 31
- mura no ikinokori 31
- mushiyaki 31
- n2jirai 31
- nagaremono 31
- next 31
- ngamura-san 31
- nicutoka tabete mitanainaa 31
- niji wo machinagara 31
- nippon teikoku toshokan 31
- no-plan 31
- noa 31
- noriajou 31
- november. 31
- ogon shinshi club 31
- on your mark 31
- oppai baibai 31
- orenjiya 31
- p-me 31
- pantwo 31
- pretty maids 31
- prickly ash 31
- rasen 31
- red-uguisu 31
- romomata 31
- sakaetenai desu. 31
- sake no sanran 31
- saotome-laboratory 31
- sea-son 31
- serenta 31
- shichiyou 31
- shin nanka tou 31
- shine nabyss 31
- shinyanchi 31
- shounen gekigakutai 31
- sky lounge garden 31
- spermation 31
- sphere 31
- sprite 31
- straight lemon kajuu 100 31
- strike back 31
- studio asankachisso 31
- studio daiya 31
- sweet milk shake 31