For powder, Hokkaido is probably best. Resorts like Furano and Niseko are famous for it. I believe they also have some back country tours you can sign up for that take you up in a snowcat. These resorts are crawling with Australians, not that there's anything wrong with that.
If you want to snowboard in powder and be completely surrounded by Japanese people, then Tohoku resorts are your best bet. I learned how to snowboard in Aomori and Iwate Prefectures, back in 1994-1996.
If you want to snowboard in powder and be completely surrounded by Japanese people, then Tohoku resorts are your best bet. I learned how to snowboard in Aomori and Iwate Prefectures, back in 1994-1996.