Would it change anything? In 45 it was obvious Japan was defeated to everyone with a brain, only the drunk on "honor" suicidal part of the Military wanted to continue and even then there was an attempt to prevent peace through a coup.
In 1943 I imagine that the Army especially, still thinks that there can be a negotiated victory and they would oppose any peace.
They wouldn't just end it, because the Emperor wants it to end, remember that the Army and Navy have been operating independitly of the civil government in Tokyo for a looong time at this point.