Groups
- majimeniikite. 3
- majin doumei 3
- makai no kaniya 3
- makamacan honpo 3
- makarontaitei 3
- makibishi 3
- makisushi 3
- makura daiichi bunshitsu 3
- malevolent kreation 3
- mamagotoya 3
- mame teishoku 3
- mamedanukidou 3
- mameyamangetsudou 3
- mamiana paradise 3
- mammoth hunt 3
- manatsu8 3
- manbaka 3
- maniac purple 3
- manic 3
- manitic 3
- manman 3
- manor stories 3
- mansagu 3
- manusuck 3
- mar slash e 3
- marashion 3
- marble dog 3
- marchant of death 3
- marchen dream 3
- marebito taishitsu 3
- maricyan-fc 3
- marimo juku 3
- marionette 3
- marker 3
- maron head 3
- maron shugi 3
- marron 3
- marron baron 3
- marsh. 3
- marshmallow hoppe 3
- maru no nakahawa 3
- maru. 3
- marubatsu bunko 3
- marugoshi 3
- maruiro 3
- maruki-dou 3
- marumaru land 3
- marunomikan 3
- marusen 3
- mascot boy 3