We live in Tokyo and have a house in Nasu, about five minutes from Nasu-yumoto (hot springs) at the foot of Mt. Nasu Mt. Asahi . Lots of information on the Internet. Hiking up Mt. Asahi is a little tiring, but a favorite of the Royal Family. The Nasu Kyukamura hotel is a fantastic value and near the hot springs and trails, and family ski area. Mid-July there are thousands of fireflies in the river valley behind Highland Park....pure magic.