Pokapoka Land Takaban-no-yu

Ticket machine was all in japanese, but the counter staff who spoke only japanese got me in like a pro. Scrub down with mostly old locals (and one tattooed fellow) in a humble, but functional place. Sauna was extra. Massage chair after words. A fun little adventure. Gender segregated. All nude. Good price.

Small, but no-frills onsen. Only paid about 500 yen to go in. They rent towels at a small fee, and they sell soap, too, if you happen to forget.