Eastern black bear (Ursus americanus americanus) eastern Montana to the Atlantic coast, and south to Texas. Thought to be increasing in some regions. It is amongst the largest-bodied subspecies and almost all specimens are black.
The biggest difference between Japanese tubs and American tubs is that the Japanese tub itself is heated so the water stays warm longer. Why bother taking a bath if the water is cold before you're done soaking those tired muscles?