Actually nowadays many originals no longer come from Japan. Remember last time original brake pads where got so cheap? Usually cost at least close to $200/set. Now suddenly becomes $110 or even $50+. I guess they must be "2nd grade" or "3rd grade" OE, or some may even be fake for that matter.
What kind of brake pads we choose depending on your requirement. There is no such thing as a wonder pads with no dust, good friction, no noise, long wear rate etc..... physics is physics. Originals need to compromise on certain criterias.
Have you noticed many european cars (even Lexus) their front wheels always very dirty? I think in Europe autobabns, they need strong friction pads, so have to sacrificed on dust. While Japanese cars usually have clean rims.....so maybe this is compromised, since these kind of brakes is sufficient on Japan & Asia roads.
So if for example, some need less dust, softer pedal feel, but compromise a little on braking friction, cost no issue, then can choose originals. But if you need more friction, then maybe have to consider other aftermarket brands (renowned ones la!) that gives you better friction, but maybe produces more dust or even noise.
For buying cheap brands, i can only say "buy an expensive cow, but tried to save on the rope".