I would never own a Japanese car"
I have an uncle who feels exactly like you do and whose plane was shot down in the Pacific.
Yet he has owned several Mercedes during his life which astounded me since the Germans matched the Japanese for brutality and mercilessness during the war.
Its OK to make a statement but he should have been consistent.
I think relevant Germans were tried for war crimes and those getting away have been hunted down. Also, I have not seen the denial or revisionist history coming from Germans that I have seen from Japanese.