There is no space for a rotenburo in this first floor supersento built underneath a gym, but it doesn't need one. They have a very inventive "outdoor" area that is worth going to see at least once. High quality stone is used throughout the modern bathing area giving this bath a much better feel than one might expect for the area. The hot spring was not very noticeable, but it was effective afterwards. For the price this is a great place for what they offer. Only down sides was the smallish Spartan changing room and the uneasy atmosphere I felt from the fellow bathers and staff.