Best Japanese singer

I like Kokia. The songs she did for Ar Tonelico 3 were magical, enough said.

Utada, Hikaru.

There is no best Japanese singer/band. It depends on personal preference, of which not all people have the same of. Buuut..... If you want my personal opinion, here it is. I don't have much of a preference for one or the other, mostly all at the same time, so I'll have to make a list.KOKIA
Utada Hikaru
Janne da Arc
Do as Infinity
dream
Takahashi Hitomi
Sukima Switch
Hayashi Asuca
Garden
Yae
Day After Tomorrow
Tackey and Tsubasa

... No, really? I never would have thought that.