The Asian rock I hear beats out any of the little current western rock I hear, which mostly sounds to me like homages and reedits of legends past. However I don't care for Asian rock that copycats Western rock, which cancels out most of MTV Asia and Channel V. There's so much good stuff out there, many of them doing well with constant touring and live shows, where audiences go mad.
From China: here's an extreme introduction: Pangu rock. The man is crazy. Also Pk14
From Taiwan I recently discovered 董事長 合唱團 (The Chairman), in the delightful Fokkien rock tradition, 四分衛(Backquarter), and young Vera Queen. Unfortunately since right about Luan Tan's space rock disbanded at the turn of the century, legendary Taiwan rock has mostly sold out.
In Singapore there's Francis Frightful's infamous O.P., so named because the garment didn't allow them to be called Opposition Party. Melvyn and Little from fFurious introduced me to the rocking sounds of Force Vomit. They came around to judge the Lomo Wonderland exhibition at the Esplanade, and chose the winners with their eyes closed. Now that's class. There is also Muon, (hey Ginette!), Objection Overule, Typewriter (hey Chang Kang!), and The Boredphucks (now reincarnated as The Suns):
Thailand has a garth of amazing rock. Futon's Thai songs are infectious and brilliant. Their cover of "I wanna be your dog" is drop dead. Redtwenty is a young band whose sound is unique and hauting. The amazing Apartmentkhunpa has their own world too, acid funk rock on ether. There's of course the incredible Rik Vachirapirum