The Japanese Did Not Like The Germans (Collier’s Magazine, 1943)
A ranking member of of the German embassy staff in Tokyo told me a few weeks before Pearl Harbor, ‘If Japan goes to war against America and Britain, our days will be numbered here, too. Japan will wage a race war in which we Germans will be regarded as enemies along with the rest of the white race. It is only a matter of time. They intend to conquer all of us, but they are smart enough not to tackle all of us at once.’
Imperial Japan had a great many reasons to dislike their Nazi ally and most of them were far more legitimate than this one. All of them are are laid out in the attached article.