Groups
- mashira no gotoku 1
- mashiro no hihoukan 39
- mashiro tamago 1
- mashomaro 17
- mashou zoku 1
- mashumaro hibiki-dan 2
- maskdo 16
- masked bros. 5
- masmenos 3
- maso pink 3
- masochist high 14
- masop 2
- masquerade 5
- massala 12
- massaratou 57
- massel 4
- masshiro club 2
- massrao 4
- master h 1
- master k 1
- master mind 1
- master piece 4
- master volume 48
- master-random 21
- mastermind 15
- masters of ero 1
- masuda gunkou 2
- masudaya 2
- masukawa 2
- masulao maximum 11
- masumasu soul gorilla 8
- masumi pan koubou 4
- masuraion. 8
- masuraion. 5
- masurao 3
- masuraojisan 6
- masys 1
- mat 13
- mata ashita. 120
- mata ashita. 47
- mataatode 1
- matagitei 27
- matango honten 2
- mataro 58
- matatabi sanjou 20
- matatabi spray 1
- matatabi zouen 1
- matazure tengoku 33
- match hakase 8
- matcha pink factory 1