> Uh huh

Acknowledgement that it was a warcrime.

> by which standard that Imperial Japan recognized and adhered to?

Admonishment to get some damn perspective. What was done to Japan must be evaluated in the context of what Japan would have been doing to American soldiers and POWs had America been forced to invaded Japan proper. That war was non-stop war crimes from Japan. Particularly perfidy, false surrender, which would have gotten huge numbers of Japanese civilians killed in any case. Truman made the right call, for America and for Japan.