Japan's eagerness to attract Jews was based on the popular belief that Jews were wealthy and had a lot of political influence, but only a small portion of Jews went to Manchuria, and many of those that did eventually moved into Shanghai.
Challenge: Have more Jews immigrate and settle in Japanese Manchukuo in such a way that Japan gains extreme favor from the Jewish population.
What would happen, especially to Militaristic Japan's relationship with anti-Semetic Nazi Germany and WWII?