We stayed at Seigaku hotel in Kawaguchiko. The hotel has a spectacular view of the lake, at night the lights from the hotels around the lake reflected beautifully on the lakes surface. Our room had beautiful green tatami mats on the floor, and had a very pleasing minimalistic appearance.
The meals were very nice, we had our own private dinning room which was nice.
The best part of the hotel experience was the baths accompanying. There were two female baths, on indoor, and one outdoor. The baths were beautiful, and completely empty on a monday night. It offered a perfect and relaxing evening.