I've heard that it is so popular that it is always full in weekends. I dropped by to check if it is true. The building is new and clean. The batherooms have the following facilities: a sauna room, a cold water bathtub, a bubble bath, utase-yu, or streaks of water falling from above and people place their body to hit a water streak on the stuffed shoulder or other parts, an open-air bath, an ordinally inside bathtub and a shallow bath tub where you can lay your body. They have various kinds of bathes.
And, it's a good news for parents who have little children. A slide is also equipped. The hight is about 2m and it may not be an exciting one.
Water quality consists of sodium and it may contain a little sulfur. There was no display about water temperature, but I think it was around 41 digrees centigrade. There are from 15 to 20 sets of a shower and a water tap. I didn't mind the number because there were not so many people.
As a souvenir, I’d like to recommend a sake bottle made by a dried squid. Squid is a representative fish of Hakodate and you can find many products related to squid. Pour heated sake in the squid bottle, sake will get a specific flavor and be tastier. In addition, you can eat the bottle after drinking.
Squid Ink Dyeing
There are products dyed in squid ink. The photo below is a tissue case.