Nagano

http://www.jigokudani-yaenkoen.co.jp/ - link for the monkey park. See snow monkeys in the onsens!

to stay:

Lodge Nagano - Nozawa Onsen Village. Nestled in the Japan Alps is a magical place steeped in culture and with some terrific skiing and boarding. Nagano was home to the Winter Olympics in 1998. Nozawa Onsen is a very traditional town with beautiful hot springs, friendly locals, and terrific snow. Special Discount for all JETs

http://www.lodgenagano.com