We stayed in the summer season, and we could take part in activities like riding the gondola up the mountain, hiking, marshmallow roasting, the hot spring, etc. Many more activities were offered, but some cost extra.
As a foreign resident of Japan (English speaker), I would have appreciated a little more bilingual support. Conversational Japanese is just fine, but when I asked for more detailed information about the property and activities, they could only provide papers and maps in Japanese. I would have liked some bilingual pamphlets and maps.
Otherwise, we had a wonderful stay and would recommend it to family and friends. No restaurants are nearby, so consider making dinner and/or breakfast reservations.