This month in history why did Japanese Emperor delay the surrender?

this month in history, Aug. 6, and again on 8, major atomic bombs destroyed two industrial cities in japan.

delayed, not surrender on date 7, due to a-bomb nor 9 due to second nor 16th as promised?
delayed, not surrender on date 7, due to a-bomb nor 9 due to second nor 16th as promised?

later, on 15, announced surrender, why not on 8th? after seeing powerful bomb? if not due to one, one 7, why not after two? still on 9 no surrender? and if ordered on 15, must obey orders? this was emperor not merely a general.

This month in history why did Japanese Emperor delay the surrender?
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