Use this day spa and you can also stay at this hotel if you are going to hike Tokachidake.

Ryounkaku Natural Onsen (Tokachidake) Spa offers a unique mountain retreat experience in Hokkaido, Japan. Nestled high in the mountains, this rustic ryokan provides stunning views and a traditional hot spring bathing experience. Guests can relax in the iron-rich waters while taking in the picturesque surroundings. The rooms may show signs of age, but the delicious meals and friendly staff make up for it. Overall, Ryounkaku is a great spot for nature lovers and those seeking a peaceful getaway in the wilderness.