Hotel Sunvalley Nasu
Kanto, Tochigi · Year-round
Large Nasu resort hotel with pet-friendly cottage/room products and onsen facilities for owners—confirm current pet building rules on official site.
Indoor option
Indoor / all-weather facilities noted for this stay.
Year-round oriented
Facilities aimed at year-round use (confirm maintenance closures).
Outdoor spaces
Outdoor areas listed — check season and weather.