Ukraine has a proper army and the support of Europe, albeit with dated weapons. Japan has neither and it's dubious whether the United States would step in. Hokkaido has always been under threat from Russia and the Soviets quickly took the Kuril Islands, which wasn't even originally theirs.
Ukraine has a proper army and the support of Europe, albeit with dated weapons. Japan has neither and it's dubious whether the United States would step in. Hokkaido has always been under threat from Russia and the Soviets quickly took the Kuril Islands, which wasn't even originally theirs.