not nessisarily replying specfically here. but there are some styles that havent made it intertnationally, that are only present in any meaningful number in their home country, or X countries. So if you want to learn them you either have to host somone from there or go there. and you generally adopt some customs etc from the place you are living in its semi unstoppable. There are a few japanese fighting styles i know of that are only really of any significance in japan and are very rare outside it, or rarer while being slightly less in it. Plus you generally learn about your own nations history primarily in school, which would lead people to try and reserect styles etc of their homeland being from it.