For a truly hidden gem, look no further than Nanoyado Hotel Iya Onsen, located deep in the mountains surrounding the Iya Valley in Tokushima Prefecture. Arriving at the baths (there are two – one for men and one for women), guests have an exclusive view over the Iya River from the bath area. The 20 rooms available are a mix of Western and Japanese style, some with open-air baths and panoramic views of the valley.
Address: 367-2 Matsuo Matsumoto Ikeda, Miyoshi, Tokushima Prefecture
Website: www.iyaonsen.co.jp/en
Tel: 0883-75-2311