Groups
- mashimaru soft 1
- mashira no gotoku 1
- mashiro tamago 1
- mashou zoku 1
- master h 1
- master k 1
- master mind 1
- masters of ero 1
- masys 1
- mataatode 1
- matatabi spray 1
- matatabi zouen 1
- matcha pink factory 1
- matenrou 1
- material girl 1
- matinee 8 1
- matrix 1
- matsubara shougakkou 1
- matsubaya corporation 1
- matsuhana 1
- matsukaze 1
- matsukichien 1
- matsumoto family 1
- matsuoka kouko 1
- matsuri-no-ato 1
- matsuro 1
- matsutake club 1
- matsutakehime 1
- mattakeume 1
- mattari honpo 1
- mattari nohohon 1
- mattariya 1
- matyaya 1
- mauntain 1
- may club 1
- mayfair 1
- mayim boy 1
- maymuzika 1
- mayoineko kansai shibu 1
- mayoneizu. 1
- mayu koubou 1
- mayu to mato 1
- mayumayu 1
- mayutokuru 1
- mayutsuba 1
- mayuziri 1
- mazemono 1
- mazoririsu 1
- mazsoou 1
- mccc 1