Groups
- zakkin heiki seizou koujou 4
- zaniah 4
- zanryuu shinen 4
- zarame-ya 4
- zashiki-neco 4
- zassou holiday 4
- zaxwu 4
- zecchou papiko 4
- zeiniku shoujotai 4
- zekkou 4
- zemribbon 4
- zenkishi ryou 4
- zero hour 4
- zero shiki hummer 4
- zerosam 4
- zettai bluenoid 4
- zettai yarumoni 4
- zettai zetsumei 4
- ziggy star dust 4
- znzn games 4
- zouni 4
- zundamori 4
- zundoko sakaba 4
- zuripai games 4
- 0 return x 3
- 0201 3
- 0909 3
- 1 3
- 10000 dollars 3
- 1000000 3
- 100dpi 3
- 100mjack 3
- 100s-r 3
- 108. 3
- 1145 3
- 16m 3
- 1862 3
- 18sbunny 3
- 19 3
- 2-dome no nemuri 3
- 2000kcal shake club 3
- 20twenty 3
- 21 seiki renaissance 3
- 21 seiki sekai seifuku club 3
- 256connect 3
- 2961 3
- 2click 3
- 2n2n 3
- 300c.c. 3
- 303 3