Lovely hotel! While the hotel itself it a little outdated, the staff are incredibly friendly (and know English, which was good for us!). The best part is the onsen, which is quite large and does mixed bathing (they provide you with swim costumes). You are in a great location to get to the ropeway (3 minutes walking), or to go down to the kogen onsen and the brown bear center (1 hour by car). The gorge and waterfalls are also nearby.
The buffet was also quiet expansive. It’s not great for vegetarians, but I never came away hungry. My partner, who eats meat, was delighted by the crab - crab in most of the food items, and also crab legs.