Rina Aiuchi
Kou Shibasaki
Miliyah
Crystal Kay
SATOMI'

Nanase Aikawa is the only person these days that I can listen to a full day without getting bored.

Weekly Top Artists
Sunday May 14 - Sunday May 21
1. Aikawa Nanase 322 plays

I also recommend Mika Nakashima(<3<3), Crystal Kay, Jolin Tsai(Chinese), and mink(<3)

Of course, it really depends on taste. I say try them all and see which suits your liking best.

Judging by the bands you've posted..I'd reccomend:

globe (my favourite band ever... they're amazing)
The Brilliant Green
Judy and Mary
Move
Nami Tamaki
Aya

That's some of my favourite artists... apart from that I've got TONS of J-rock and Visual Kei lol

Yuna Ito!! - if just want to hear a very beautiful and heavenly voice..
BENI ARASHIRO!!! - Nice Pop music..
Hitomi Takahashi - Kinda Rock w/ a powerful voice
KOTOKO!! - Trance and some anime songs..^_^
Nana Katase -kinda like the "Kylie Minogue" of JPOP
Jolin Tsai! - If u wanna try C-POP..she's the 1st artist you should try to listen to..
Zwei! - Awsome JRock with a lil bit of Pop!!
m.o.v.e. - POP = ROCK with some rapping and the female vocalist really has a nice voice
Sifow!! - Im a new fan of her after hearing her Clover single..very good..
Nami Tamaki
Ami suzuki
ELT

check out my latest favorite

Mai
http://www.rhythmzone.net/mai

Agreed. Powerful voice and catchy songs.

try Hajime Chitose
^her music is brilliant (that comes along with her extraordinary wonderful voice)

aaand of course, everybody's favorite (but not yours i see), MIKA NAKASHIMA

haha like most of us
Mika Nakashima
Angela Aki
Bonnie Pink
Kotoko
Rie Fu
Yaida Hitomi

Mai Kuraki
Misia
Shibasaki Kou
Matsu Takako
MAX
Hitoto Yo
Every Little Thing
Kiroro
Kudo Shizuka
Nakayama Miho (my favorite from her is "Sekai no Dare Yori Kitto")
Kokia
HAL
Aikawa Nanase
Melody
Sowelu
Komatsu Miho
Dreams Come True
Day after tomorrow

i have a new favourite artist
for male i love uverworld
for female hitomi takahashi was really nice, ayaka was great too
and so many