People already go too far on judging nationality as a vital characteristic. A person could be born in Japan and never really grew up there or he could be a fluent speaker but somehow not be connected to Japan itself just learning the language via their parents. There are any number of possibilities, in theory I have a history going back to Asia but I've never been near the place so its my DNA partially but its not my culture. I'm just mentioning, its going to be very hard to guess from afar someones exact makeup or personal bias.
My personal take on Satoshi is it was a group of people, not a personal name just an alias for posting like is normally done. Its very rarely I've used my real name for any online presence, I'd always recommend not giving out real data unless its required and I think thats good sense to teach children online for example as they need to keep a line between people they actually know properly.
big fan of Japanese people (country)
Thats very likely, its quite a distinctive country vs many others in the modern world which were run over by global empires long ago. Japan if I've read rightly was quite 'late' to transform into a global orientated economy and culture so it has something ancient to it even now.
How many people actually know who Satoshi is/was?
Hopefully nobody so they are never bothered. I've always thought it was related to the amount of trouble that PGP as disruptive technology managed to stumble into.
