Japan does not have the same cultural baggage about this you'd find in the west. There's no huge population that had the whole Bible and "Mark of the Beast" drummed into their heads. There's no conspiracy theorists. No persecution of Jews - even though they were an ally of Nazi Germany.
Japan has conspiracy theorists as much as America has if not more. Here is a poll from 2014 asking Japanese whether there is a conspiracy of shadowy organization controlling the world in secret, and 60% answered yes. As for Japanese positive attitude toward Jews during WWII, that was a result of Jews bankrolling Japan during Russo-Japanese War. Jews hated Russia for anti-Jewish pogroms and helped Japan and in turn Japan helped Jews during WWII. Of course that was then, now there is a rampant conspiracy theory that Japan was tricked into fighting Russia by evil Jews. Nowadays Russo-Japanese war is usually held up as the proof of how Jews controls the world by first causing a war and then deciding its victor.