Sansuikan Kawayu Matsuya

Kind of annex of the sister hotel next door. In the annex is an onsen, washing machine and dryer (free to use), vending machines with beer and drinks and noodles. Room is basic. I had a great view on the river. Small balcony, but dirty and no chair. The annex is okay to stay if you are hiking. The best thing is the sister hotel. A great onsen with outdoor bath. Nice souvenir shop with a bit more food. Staff are super friendly and helpful. They also provide bus services (bring and pickup to Hongu Taisha, the other onsen places, the trailhead busstop) which you can use! Just call them if you want to be picked up. I did not realize Kawayu Onsen is a very small place with NO supermarket. If you did not book breakfast (served at the sister) bring your own into town or eat instant noodles. There are 2 small restaurants with delicious local food.

There are not a lot of cheaper options in the area. This hotel is a typical "cheap" Japanese hotel. All was as expected: small rooms, super clean, brad facilities. All in all, charming, but old.

Nostalgic and clean hotel, unforgettable senin furo worth a try.