I don't have any specific favorite artist but to name a few....Rainie Yang and Yamashita Tomohisa.

my favorite artist are Shinhwa, DBSK, Se7en, Shin Hye Sung, lee Minwoo and a lot more..

well my favorite artist is the game,and old skool stlye is dr dre
my favorite japanese artist would have to be koda kumi

this is always a hard question..

Jay Chow, Relient K, Uverworld...Those are probably my favorite bands.

i love wang leehom!!!....

wow...... this is very hard....

i would probably say Tension ... because their songs are to DIE for also..... Rain/Bi, Se7en, Kangta & Vanness, Rainie Yang, Jolin, Jay Chou, JJ Lin, Shinhwa, DBSK, 183 Club, Wheesung, Shyne, Taebin, and a LOT more

Wow.
I'm really surprised that there's someone who hasn't heard of Miyavi!

But, um, favorite artist?
I cannot choose.
However, here are some of my favorite bands:

Japansese
Buck-Tick
Dir en grey
Luna Sea
Inoran
Guniw Tools
La'cryma Christi
Kiyoharu
girugamesh
deadman
The Pillows
Thee Michelle Gun Elephant
cali=gari
Fake?
X Japan
Malice Mizer
Penicillin/Hakuei
Asian Kung Fu Generation

Western
David Bowie
Queen
Led Zepplin
The Beatles
The White Stripes
The Strokes
Red Hot Chili Peppers
Orgy
tool
A Perfect Circle

But mostly Buck-Tick and David Bowie.
*nod*

Eastern
-UVERworld
-Asian Kung Fu Generation
-High and Mighty Color
-L'arc~en~Ciel
-Do As Infinity
-Namie Amuro
-Younha
-Utada Hikaru
-Home Made Kazoku
-Yuki Hsui
-Faye Wong
-Wallace Huo
-Dir en Grey [there's gonna be a concert in february...that I will miss ;_;]

Western
-Adema
-Breaking Benjamin
-The Calling
-Evanescence
-Styles of Beyond [brother just got me into 'em]
-Fort Minor
-Strung Out
-Trust Company
-Linkin Park

^ You're not going to the concert?!

That really sucks...
I went to see them when they went to NYC.
It cost me almost $1000 and gave my family a heart attack when my phone went dead, but it was one of the best experiences of my life.

I can't wait until February.