A squarish (900 x 1000mm - internal dimensions) ASNARO-HIBA tub.
It has a top frame (100x50) and joints are finished with wooden plugs.
Two low benches can be used as a step to get inside or to relax after the bath (this hot-tub is located on a terrace and I guess that the view is stunning!)
japan{at}bartokdesign.com