Groups
- sinyoukan 1
- sio ra-men 1
- sion 30
- siooninco 5
- siop 17
- sioyaki 11
- sioyude 20
- sippo 11
- sippo-soft 29
- sippudo 2
- siratama nikukyuu 8
- siratamadon 3
- sirens domain 41
- sirisiri denbu club 15
- sirius soft 14
- sirius. 37
- sirius. 2
- siro house 6
- siro-noir 1
- sirojio 6
- sirokuma meganeten 1
- siropome 3
- sirotaruto 64
- sirotatedou 11
- sirotateto 7
- sirousagicafe 2
- sirouto plan 3
- sisaku 1
- sisi 1
- sisinabeya 1
- sisiten. 1
- sisizanoa 1
- sissch 2
- sisso 3
- sister mytory 21
- sister screaming i die 70
- sister soft 5
- sisteralice 1
- sisterbreak 1
- sisterplan 1
- sistny 5
- sistny and anasis 67
- sisui sisters 1
- siteado 1
- sittori oblaat 8
- situation laboratory 10
- situkisinnra 1
- six shot 8
- sizuku sushi 9
- sjf 2