the original star wars film was a direct pretty much scene-for-scene adaptation of kurosawa's the hidden fortress
This isn't even remotely true. Maybe turn down the hyperbole knob a bit?
not denying that i can be prone to hyperbole from time to time, but this is 100% true though . lucas even tried to cast toshiro mifune as obi wan. it's not that unusual. the amount of films and tv shows in the US adapted from abroad is pretty huge. at least lucas didn't try and deny it like disney did when they took kimba the white lion.