how did japan become the most powerful nation in asia?\no japan doubled its territory in asia.\no japans…

Brief Explanations:

Japan modernized rapidly by adopting Western - style military technologies and training methods during the Meiji Restoration. This military modernization was a key factor in its rise as a powerful nation in Asia. Doubling territory was a result of its power rather than the cause. While its economy later had some US - influenced elements, this was not the main early factor in its rise. Alliances were also a later development in its power - building process.

Answer:

Japan adopted Western military technologies and training methods.