Some Japanese schools won't let students read a famous manga book because it shows some of the atrocities that Japanese troops committed during the occupation of other countries.

One kind of atrocity they committed was waterboarding. The US executed some Japanese soldiers for this. However, the US has done nothing to punish the Americans responsible for committing the same brutal act.

It's clear that the Japanese officials who imposed this censorship care more about whether Japan looks good than whether Japan is good. You can see the same behavior pattern in officials in other countries.

The capacity to commit atrocities exists in every nation. Thus, all governments must do their best to prevent atrocities by holding perpetrators responsible.