Through the power of Wikipedia, here is just about every artist that is really Naoki:
8 bit – used only in "Afronova Primeval"
180, 190, 190', 200, 270, 290 – numeric pseudonyms refer to the song's BPM rating, and are used on the fast-paced "PARANOiA" sequence of songs
1479 - used only in his remix of "Get me in your sight"
B3-Project – Used only in "The Theme From Enter The Dragon"
BeForU, BeForU NEXT (sound producer)
Blue Destroyers - used only in "Hypnotic Crisis"
Crystal Aliens – used only in "Sexy Planet" and "Sexy Planet (from Nonstop Megamix)"
D&G Music Factory - used only on OSTs [BM 5 OST]
d-complex – used only in "Ecstasy"
DE-SIRE – used mainly on the "Trip Machine" series of songs, on Healing Vision, and also on Tsugaru (vs. another Naoki alias, RevenG) [DDR Ex OST]
DIVAS (member of) – used in "Baby baby gimme your love", its 2002 remix, and "Secret Rendez-vous" [DDR PC OST]
DJ Kazu – used only for his remix of "Luv To Me"
D.J. RICH – used only in "SUPERSTAR" and its remix
FACTOR-X – used only in "Wild Rush"
Fixx – used only in "Vanity Angel" [DDR Ex OST]
KTz (member of) – used only in "AM-3P" and its remix "AM-3P East Mix"[DDR PC OST]
Luv Unlimited used only in "Candy (star)"
mitsu-O! - used in Jamaican-style songs [DDR PC OST]
NAOKI – used often, though not always, in Eurobeat songs
NAOKI 190 – used only in "Hysteria", also refers to the song's BPM rating
NAOKI J-STYLE – used only in "Kiss Me All Night Long"
NAOKI underground – used in a few trance songs [DDR Ex OST]
NM – Naoki Maeda's initials [DDR PC OST]
N.M.R – used a few songs in earlier versions of DDR; it is commonly said to mean "Naoki Maeda Revolution", but some sources say it's "Naoki Maeda Recordings" [DDR PC OST]
NM Sequence Unlimited - used only on OSTs [DDR Ex OST]
NO.9 – used only in "End of the Century", refers to Beethoven's Ninth Symphony, from which this song is a reinterpretation [DDR PC OST]
NW260 – used only in "Drop Out"; the 260 refers to this song's BPM rating, which was much higher than any other song from the game when released
Ω – used only in "Max 300"
Rice C. – used only in the remix of "Jam Jam Reggae"
RevenG (alternately RE-VENGE and Reven-G) - used in ethnic songs, like "Afronova," "祭 (Matsuri) Japan," "exotic ethnic" and "桜 (Sakura)" [DDR Ex OST]
Stone Bros. - used only in "Let the beat hit em!" and its existing remixes (the beatmania IIDX version, and Classic R & B style)
The Final Band [DDR Ex OST]
The Surrenders – used only in "Gorgeous 2012", a song from Dance Maniax.
UZI-LAY - used in "Put your faith in me" and its existing remixes (Jazzy Groove and Saturday Night Mix)
Ζ – used only in "Maxx Unlimited"
Ζ Ζ– two overlapped zetas; used only in "The legend of MAX" [DDR Ex OST]
N&S (member of) – used only in "Dead End", refers to Naoki & Sota (Fujimori)
DDR ALL STARS (member of)
TËЯRA (member of)
Understand that whenever you refer to Naoki, you are referring to the entire mess of artists above.
