Nozawa onsen in Nagano has 40cm up top of the mountain and will probably be able open next week.
This is where I do most of my riding.
Would love to try out your guys areas too but its just so convenient a 4 hour drive up to Nozawa and it has amazing side country.
I may make a trip up to Hokkaido at some point.
Let me know if either of you find yourselves in Nagano.