So...you know it sounds really crazy to say that a garment that has plenty of identical antecedents in Japan is an import from the West, right?
Cliff, he's right. Look into trousers. The hakama is Japanese in origin. That's Japanese pants.
The pants on the judogi/karategi/aikidogi are not. They are European.
In AIkido we wear Japanese pants (hakama) over European pants (gi pants).
Look into the history of trousers and pants. Horses are figured into that, too. Learn more about how and why some civilizations moved from wearing robes to pants.