Nitro Microphone Underground is a Japanese hip hop group. NMU are one of those groups where it is hard to tell who is actually in it and who is not (like Wu-Tang Clan or So Solid Crew). The group appeared on the club scene in the late 1990s with members Dabo, Macka-Chin, Deli, Suiken, GORE-TEX (although Gore-tex appears on many songs on the Nitro Microphone album, he is credited under different names, including the alias "More-sex"), S-Word, XBS, and BIGZAM.

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