No, there was no moral justification.
If there were one it wouldn't be about race it would be about economy and perhaps just racing to flag a piece of land before the neighbours do it.
Also what you linked can be more or less summed up as this:
Post war winner propaganda. Prove me wrong.
Also:
About 10,000 Japanese nationals (mostly diplomats and military officials) residing in Germany were given "Honorary Aryan" citizenship with more privileges than any other "non-Aryan" ethnonational group.
So much for your link. It was all propaganda, from both sides. It wasn't about race it was about nationality. "Aryan" was basically code word for german and had nothing to do with genetics.
Nazi policy stressed the superiority of the Nordic race, a sub-section of the white European population defined by the measurement of the size and proportions of the human body models of racial difference.[40] From 1940 the Nazis in General Government(occupied Poland) divided the population into different groups.[41] Each group had different rights, food rations, allowed strips in the cities, separated residential areas, special schooling systems, public transportation and restricted restaurants. Later adapted in all Nazi-occupied countries by 1942, the Germanization program used the racial caste system of reserving certain rights to one group and barred privileges to another. Ethnic Poles were believed by Hitler to be "biologically inferior race" that could never be educated or elevated through Germanization[42] During the occupation of Poland, the Nazis kept an eye out for children with Nordic racial characteristics, those among them found to be classified as "racially valuable" were sent from here to the German Reich for adoption and to be raised as Germans, those who failed the tests would be used as slaves or murdered in medical experiments.[43]
That's even more BS.
You don't go around making japanese "aryan" and at the same time keep an eye out for great nordic racial characteristics. Hitler himself had probably none.
As I said it was war propaganda from both sides.
Edited 9/22/2014 13:12:58