Alexi Laiho (CoB)
Syu (Galneryus, Spinalcord http://www.youtube.com/watch?v=Znsw9...next=1&index=7 )
Sugizo (ex-Luna Sea, X-Japan http://www.youtube.com/watch?v=HMMezWwLUYE)
Daita (ex Siam Shade, Binecks http://www.youtube.com/watch?v=LptvdxChl0k)
Takashi Ohmura http://www.youtube.com/watch?v=QQ4AsE0jjeg
Demetori (http://www.youtube.com/watch?v=JAiEEOxM6Yo)
AS you can see most of the are japanese, all of the songs above are solo works or demonstrations... btw i left out the obvious ones like satriani, vai, petrucci and dave mustaine...