The hotel and capsule hotel, but I stopped by there for a day trip during my lunch break because it is one of the few hotels in the east of Hakodate where day trips are available all day: from 6 a.m. to 10 p.m. The visit costs 800 yen, renting a small towel is 100 yen, a large one is 200 yen. JAF members get a free drink. The washing area apparently uses onsen water from the shower (you cannot adjust the shower temperature), with soap and shampoo, two hot baths (41°C and 44°C) and one mizuburo (21°C), there is a sauna which was about 90 degrees. The photo is from the internet and matches (but thermometers appeared in the baths). The water is gensen kakenagashi (directly sourced), clear, colorless, and odorless, it seems almost soapy, but there was no detailed information sheet about the water. A pleasant place, simple but clean, bright and spacious, you can stop by to wash up.