Since Japan and Germany were allies during WWII, I'm curious how much the Japanese knew about the Nazis' death machine and all the atrocities in Europe. And if they knew, what was the reaction of the Japanese brass? Did they feel indifferent, guilty by association, or anything else?
You might look up Chinue Sugihara as a rare example of a Japanese official (Japanese ambassador to Lithuania) who, in 1940, after the USSR occupied Lithuania but before the Nazi-Soviet pact broke up, gave up to six thousand Lithuanian Jews visas to travel through Japanese territory and negotiated to allow the Soviets to let those Jews use the Trans-Siberian Railroad. Sugihara did this with absolutely no instructions from his superiors and broke quite a few rules in the process.