I can now confirm that Norway's Motorpsycho is set to play Japan as part of the "Hyakkiyakou" 2003 festival which is organized by Japanese act Qurili. More info: http://quruli.d4k.net/hyakki2003.html (in Japanese)
Other Norweigans set to play Japan soon include Askil Holm who will be doing some in-stores and acoustic gigs in the near future, as well as Cato Salsa Experience who will be coming over with Moony Suzuki.