Japanese companies are famous (infamous?) for the care they take of their workforce. It isn't humanitarian: a happy workforce is a more efficient and productive workforce. It works, because Japanese companies easily outpace American and European companies for efficiency.
Thing is, I consider such things to be intrusive, so I would never work for a company that made me do anything like that. Not smoking, ok, physically being forced to wash hands before leaving the restroom, ok, but being forced to exercise, no. I'll do my own exercise, thanks.