Researches, virtual bibliographies: 

An article in Jewish Virtual Library states that the Japanese were aware of Berlin's cancellation of German citizenship of all Jews who had left Germany would affect several thousand Jews in Shanghai (territory under Japan occupation). In May 1942, Germans urged the Japanese to do something about the Jews living in their territories before they became a "problem" yet, the Japanese refused to go along with the German demands. Japanese policy towards the Jews was that they would still be considered as any other group of foreigners, although the distinction of "Jewishness" would be based on race and culture. But this distinction applied only to stateless refugees - which meant German and Polish Jews. This group of Jews would be under surveillance because of their "racial characteristics." Another category of Jews, those who could be considered "useful" to Japan because of their political or economic influence, would receive the same treatment that they received prior to the war.

Thomas U. Berger explains why Japan is viewed as so unrepentant. Some 20 million people died and millions more were subjugated and oppressed during Japan’s half-century of war and colonial expansion, which ended in 1945. In a new book, War, Guilt and Politics After World War II, Cambridge University Press, 2012, Berger says a complex web of culture, politics, geography and shifting notions of justice have made it more difficult for the Japanese to apologize for past transgressions than other societies. That’s particularly true compared to Germany, whose crimes outstripped even those of Japan, but which has largely reconciled with former victims.