If Germany isn't going to pay reparations to the families of millions of Jews who were annihilated during WWII, then Japan shouldn't have to pay reparations to the families of Korean or Chinese people who were annihilated during and before WWII either.

However, In the U.S. the federal government has paid reparations to Native Americans who were deliberately mistreated et similia during the 19th and 20th centuries. Since they have set a precedent they must continue to make such payments as new cases arise.

See, the point here is that if there is no precedent and governments refuse to set one, then others shouldn't be held to a different standard. However if there is precedent, then it should be followed.