Mt. Mizunoto is a nice mountain for winter hiking as well. You can borrow snowshoe at Takamine Onsen.
Mt. Mizunotou (水の塔山) is a 2,202m tall mountain located in Nagano prefecture. It has a great view of Kita Alps, Chuo Alps and Mt. Fuji. It is only 2 hours trekking from the entrance.
Tourist Info.
There are parking and restroom.
Access
0. Omuro Station.
1. use local bus to Takamine Onsen.
2. walk
3 hr.
Let's learn MJER Iaijutsu. 
映画好き集まれ！ 
Mt. Mizunoto is a nice mountain for winter hiking as well. You can borrow snowshoe at Takamine Onsen.