I was disappointed with the #2 things to do and not so sure this #3 review will be good enough.
But then give a go.
It was a very interesting place. With 2 outdoor pools, one with jacuzzi and 4 indoor pools from very hot to very cold, also sauna and steam room.
I found the most interesting pool was the one with electric pulse. It was very unusual and for sure not everyone's cup of tea.
The onsen is very clean and well maintain and surprisingly, it only costs 440 yen for adult.
Don't worry if you have tattoo, just ask the front counter and borrow the arm or leg tattoo cover.
Highly recommend to have a try!!