Nozawa Onsen and Nozawa Ski Resort
I went there on a tour from Tokyo. The total cost, including hotel, lift ticket, and bus fare, was around 30,000 yen.
Nozawa Ski Resort not only offers skiing, but also free hot springs and a charming, quaint townscape. Hot springs are scattered throughout the town, perfect for warming up after a day of skiing. A hot spring gushed forth on the outskirts of the village, perfectly complementing the snow. It's also highly recommended as it's less crowded.
The food is also delicious, with the soba noodles and hot spring manju made with pure water being exquisite.
Previously, hot springs were available 24 hours a day, but perhaps due to the effects of COVID-19, each hot spring now has limited opening hours.
There are also many foreign tourists, who stay for around a week to enjoy skiing and the quaint townscape.