It depends on who you ask in Japan. The civilians didn't care about Manchuria since the US was in the process of destroying every city in Japan. They knew the war was lost and wanted it to be over.

The army knew that they couldn't fight the Soviets in Manchuria, occupy China, and repel American invasion of the home Islands. Amd even them, you still had higher ups in the military trying to overthrow rhe government to keep the war going.

Familiar with, not supportive of. Internal discussions of the Japanese government make it quite clear which was the more pressing concern, and the mainstream view in academia remains overwhelmingly that the threat of further nuclear destruction was the pivotal point for Japan's surrender.