亀川筋湯 (Kamegawa Sujiyu)
|Open:||6:30 till 21:00|
|Price:||No set amount. Donate as much as you like.|
This is the tiniest onsen I have ever been to. They don't have running water and there is hardly any space to sit next to the bath.
The building looks like a shed.
It is not allowed to use shampoo here, but it seems you can use soap. Be careful not to let any soap get into the bath. As I had already washed myself after the sand bath, I just soaked for a few minutes and got out.
It's even narrower than it looks.