@BasileII:
I would rather say that Japan was after regional domination (regional as in asiatic, which is still a lot!).
Imperial Japan’s the subject of my thesis, and I’ve read a number of sources from powerful figures in Japan as early as the 1910s all up to 1940s who’ve directly cited world domination as a goal. It was even a saying that the world should be made into provinces of Japan for the emperor. So, I think time frame is important to the discussion. Japan really wasn’t immediately gunning for the world in WWII, in fact Southeast Asia was its only real goal. Other ambitions were purely for operational reasons. Japan didn’t want Wake to have Wake, it wanted Wake to slow down the Americans. But, I’m sure many of the powers that be dreamed of eventual world conquest. How seriously to take this is questionable. Prince Konoe could rant as much as he wanted about Japan taking over the entire world. I certainly don’t think anyone in the government or military seriously intended on world conquest on an immediate scope of time. Mostly they wanted modern Malaysia and Indonesia.
Hitler even could talk about Aryans dominating the world as much as he wanted, I doubt the National Socialists really thought WWII would result in World Conquest with capitol letters. I think they mostly had the goal of dominating Eastern Europe, as Italy the Mediterranean. I’m less familiar with their internal politics, though, to be fair.