A:AnswerNo, there is no announced "Switch Pro". The hype was bigger than actual reveal. This is not worth it as its the same inners as original base model, in my opinion, unless you don't already have a Switch.
A:AnswerThe Japanese version will have a 100v charger, not 120v. Still 2 prong like US version. Other than that it's literally the same.
As for the other commenter that said Best Buy wouldn't be selling the Japanese model, then tell me why it's on their website right now?