There is more than one artist under this name: 1. NM is a Russian rap project. 2. NM (originally named Nocturnal Mayhem) was a black metal band from Russia. 3. NM is a pseudonym of Japanese producer NAOKI.
Toshiyuki Kakuta (角田利之) is a composer best known for his work on Konami games. Kakuta is best known amongst fans of the Bemani series of games under his pseudonym of L.E.D. (and many combinations thereof; see List of Bemani musicians). He is also known for his composition work on the Zone of the Enders soundtrack.
Re-Venge is one of many pseudonyms that Naoki works under when creating music for the Dance Dance Revolution series of video games. It is the moniker used for creating traditional ethnic style music. Re-Venge has since been renamed as RevenG.
Stone Bros. is one of the many aliases of NAOKI used for the hip-hop song Let the beat hit em! and its remix, featured respectively on the games Dance Dance Revolution 4thMIX and DDRMAX Dance Dance Revolution 6thMIX.