Groups
- jason shiina 4
- jcp 4
- jei c1on-ri 4
- jewels 4
- jiesu 4
- jikayou kamihikouki 4
- jirai soft 4
- jiruman 4
- jishin kajyou 4
- jitsuroku boshisoukan 4
- jiyou-kyousou 4
- jiyuubeya 4
- jizou survival night 4
- johnny iron pipe 4
- jongotei 4
- jui-c 4
- juicy 4
- junai shijoushugi 4
- junaist 4
- jupiter inter novels 4
- jushoku soft 4
- jutonchi 4
- juujingu 4
- juurokugoh 4
- k-toracat 4
- k2crack 4
- kabu fujisawa minato shinsenkan 4
- kagisippo tei 4
- kaii petomiumu 4
- kaijin 4
- kaikoji 4
- kaiten umai bou 4
- kaitenshiki kebabu 4
- kajiya 4
- kamadoya 4
- kamasu no odorigui 4
- kame no ko 4
- kamegoya 4
- kaminshitsu 4
- kamisoliloveletter 4
- kamome dan 4
- kamoshireya 4
- kanitama teishoku 4
- kanketsusen 4
- kansou enoki take 4
- kanzeu bugyou 4
- kao.yellow studio 4
- kaondou 4
- kaoru system 4
- kara no mozuku 4