Utada (This bish right here is fierce)
Namie (So is this bish)
Hyde
L'arc en ciel
The Mad Capsule Markets
Asian Kung Fu Generation
Teriyaki Boyz (If they count)
Nujabes (If he counts)
Dir en grey

I used to listen to Gackt in middle school, but I grew out of his music mostly because a lot of his stuff -- especially now is just like wut to me. And his dancing has always been horrible.

If you like stuff like the Mana stuff I would go with Gazette. I can't stand them, but you'd probably like it. There are very few bands in Japan that still do the whole Visual Kei thing. To my knowledge, Gazette is one of the few that still do. I loathe Morning Masume with a passion. I want to destroy every single one of them. STOP. SINGING.