Personally I dont think the Okinawans taught the Japanese cos of the occupaton of their country.I'm wondering why it might be that the Koreans didn't know these bunkai (boon hae) details that their Japanese/Okinawan counterparts knew.
Probibly. IF the japanese were taught them (which I doubt as a general thing, thoug there may have been exceptions), then this would certainly have played a part.I'm wondering how much the fact that weren't natives had to do with this. Perhaps, they just weren't seen as "worthy" (for lack of a better word) to be considered as a close "disciple" of their masters.
Unlikely IMO.. more likely your above point.Perhaps it could be that they didn't stay long enough & went back to Korea to teach before they could be taught these details.
Stuart