[victorious0702]

Utada Hikaru
Stereopony
UVERworld
Le Arc En Ciel
Asian Kung Fu Generation
The Brilliant Green (Just 1 song)
Tommy Heavenly
YUI
Yui Horie
Kalafina
Yuki Kujiura
Itou Kanoko
The Indigo
TM Revolution
Marble
Buono
Chihara Minori
Hirano Aya
Fiction Junction
See Saw
RoundTable
Scandal
Elisa
Do as Infinity
Fripside
Nana Mizuki
Inoue Marina
Aki Toyosaki / Hisaka Yoko
Porno Graffiti
Lia
Megumi Nakajima
May'n
Savage Genious
Angela
Flow
Ali Project
Chiwa Saito
Supercell
Ikkimonogatari
Boom Boom Satalites
Euphonious
Rock Chalk
Strawberry Jam (just 1 song)
Little Non
Kylee
Chiaki Ishikawa
Orange Range
Shisuka Itou
Mell
Meg Rock
Yuna Itou (mainly just a couple songs)
Aqua Timez
Beat Crusaders
High and Mighty Color (both singers are good)
Rie Fu
Access (just a couple songs)
Rie Kugimiya
Halcali
Stance Punks
Kotoko
BforU
Yuria
Origa
Lena Park
Oliva & Nana
Jinn
Nirgilis
Yoko Kanno
Joe Hisashi

And finally,
Nobou Uematsu

Are probably my favorite artists/bands/composers