Groups
- system house oh 1
- system pink 1
- system revo 2
- system rose 1
- system sacom 1
- system speculation 14
- system-sk 1
- systemsoft 1
- syugakusyo 1
- syukurin 72
- syumatsusyorijou 38
- syun-kan flowlighter 12
- syunichi kansuu 106
- syunka kikaku 3
- syunkan saidaihusoku 84
- syunkasyuutou iinkai 14
- syuntyu 16
- syupa 6
- syusetsu 5
- sztk 1
- t and h projects 2
- t-court 10
- t-e kikaku 13
- t-k-t 2
- t-north 39
- t-press 22
- t-project 14
- t-rain 1
- t-soft 3
- t-time 1
- t-u 10
- t-zone 34
- t.4.p 134
- t.4.p 31
- t.a.k.k. 5
- t.cop 56
- t.cop 12
- t.d.i 1
- t.k-cinema 2
- t.k-cinema 1
- t.k.h.k 4
- t.o.p. 3
- t.p.k 2
- t.s project 2
- t.ushikawa 1
- t2 6
- t2 art works 149
- t2 unit 21
- t2000 8
- ta and to 1