It is what it is. Japan is famous for taking an idea and running with it -- look what the Japanese did with cameras and automobiles -- and integrating it into its culture.
The knowledge, in Japan, perhaps became proprietary as a result, and that would explain why it's such a "novel concept" to all but another relative few folks today.
Yes, even electricity has become integrated as sort of "Ki" (
) via the compound- expression "denki".
the two nations were neighbors separated only by water that was navigable by ship, and it even further decreases any possibility that aiki/IP could be uniquely Japanese, with China and its powerful internal method right next door.
Perhaps comparable to the British Isles.
Insularity doesn't necessarily lead to singularity-myths.