i went last Feb to Hakuba and Cortina. I only had 3 days so just rode those two. The snow is fantastic! The locals hardly go out of bounds so there's incredible amounts of fresh even near the end of the day. Hakuba also has pretty good park if that's your thing. There were rentals available too, so if you want to save money on luggage fees just bring your kit. I rode a ultra dream with some fluxs, and performed well everywhere, but really shined in the in the trees and the deep stuff. If you make to Cortina get the lift ticket that includes the buffet and the onsen. It was about $65 USD but totally worth it. I'd love to get out there this winter, but it's not likely to happen.
DAYS 14/15: 4
2014 Bataleon Camel Toe
2011 Ride Highlife/K2 Auto Uprise
2010 Bataleon Goliath
2014 Flow Verve/Ride Revolt