KOKIA...
Jero...

I think most of the best voices in Japan came from Enka. I don't think any JPop singer has the best quality. But KOKIA is the only exception. I chose Kokia over Natsukawa Rimi simply because KOKIA has wider genre and more international.

edit:
Alan's nada sou sou also good though. If you ask me who is the best voice in AVex, i'll definitely go to Alan.

ayaka!!!

awww...

nobody saw my comment... **cries**

T_T

EMYLI - Very Christina, one of the best voices in Japan, she just has **** songs.
Emi Hinouchi - This girl is phenomenal and that is all to say.
LISA - VERY versatile singing voice, she raps as well as her singing.
Kumi Koda - Sexy, strong and husky vocals.
Yuna Ito - Star vocals without a doubt, strong clean and crisp. Great higher ranges.

Without a doubt, I really believe Ayaka Hirahara is the best vocalist in Japan. Her voice is has such depth and such a great tone, and she can sing anything. Her lower and higher registers both give me the chills.

Sakurai Atsushi from BUCK-TICK =)

I seriously love every J-pop singers voice because they are all so different. Mika Nakashima being particularly rich and unique. BoA has power and great soul in her voice. But i also love Utada's, Yuna Ito's, Ayu's, and Keiko's (globe) voices. Keiko and Ayu have very similar voices sometimes, they do that same thing where they like haha I can't explain it, anyone kno what I am talking about. even love hitomi's. They all have their own kind of specific unique talented voices. Olivia has a great voice too.

alan and Utada Hikaru c: alan is very impressive and Utada Hikaru's vocals are nice

inb4youguysflamemeforsayingUtadaHikaru

YEAH >DDDDDDDDDDD

Just saw it!!!! No way in heaven, hell or earth! xD;;;;;

I think Yuna Ito's voice is powerful - it's a shame Sony throws random pop her way. Total waste of vocal potential, if you ask me.

Chihiro Onitsuka, hands down. Her voice may have declined in power following her hiatus, but it's only improved in expressing sheer emotion. It's such a shame that she's take another break..

ayaka, her voice sound so sweet and crystal clear to me.

misia for sure...but nakashima mika's voice isn't less amazing...both wonderful

^ LOL, Namie Amuro??? XDD Have you ever heard her live? God save the backing track, that´s all I´ve got to say. xDDD

The best voice in J-Pop imo is ayaka hands down. That woman has a vocodec in her troath xD it´s incredible

Agree with daigo tho. Although his extreme physical attractiveness may be playing on my judgement xDDDDD :luv2 Kokokara Dashite makes me see Heaven xD

Miwa Yoshida, Misia, Ayaka.

Ayumi Hamasaki
Miho Fukuhara
and Yuna Ito

1. Yoshida Miwa
2. Hamasaki Ayumi
3. Utada Hikaru (Only because of her lower voice, although I really love it, Ayu's just keeps me on my toes more. Haha.)
4. Matsuura Aya (She has REALLY matured vocally, and sounds amazing! I really hope she gets signed by Avex after her H!P graduation)
5. Ito Yuna
6. ayaka

Also: EXILE's lead singers (Don't know their names. Haha.), Jero, aiko

Utada Hikaru!!! No doubt about it :)

Oh totally, H!P is losing possibly it's greatest vocalist when Ayaya's gone :( I think she'll get picked up by Avex or another decent label though, she sure as hell deserves it.

I'd say Eri Nobuchika, Kokia or Hajime Chitose. Vocal wise they are the best imo.