Subashiri no Yu

A small day-use bath in Aizubange, with a tub and wash stations and not much else. The water is clear, nearly odorless and a little slippery, and visitors say the shower and taps run the same water, so rinsing off feels slippery too. Soap and shampoo are not provided, so bring your own. The place is relaxed: rice fields stretch out front, swallows nest inside the building, and the owner is friendly and sometimes out, in which case you call the posted number. Reviewers mention a spring that has been in use for about 170 years.