I miss living in Japan, personally...if most of what you do is riding or jogging/walking, you don't
need a fitness center over there, since it's actually safe to be out on the streets at night.
Toward the end of my tour when I was taking a lot of leave, I would regularly go out in the dark hours of the morning and just walk for an hour or so, wandering around at random, and nobody ever bothered me. I wouldn't even
think of doing that in most cities here in the States – too many troublemakers.