It is unclear to discern what exactly the junta’s response was to Ishido’s diplomatic failure given the atomic bomb that fell on Nikko on the 24th of May. There would be no more recorded orders sent out from anything resembling an Imperial Japanese government ever again,
Good bye and good riddance to bad rubbish at last......
Yokoyama had no intention of trying to lead Japan even if a coordinated national polity was still possible, yet he also lacked any appetite for surrender.
Oh, fuck off. What. Is. Your. Fucking. Problem?
Yokoyama obviously still hasn't taken the hint. He'll be like the obstinate OTL holdouts in SE Asia that continue to wage annoying but ineffective small-scale guerrilla resistance from the countryside, gradually dwindling in numbers over the decades (due to starvation and desertion) until they number in less than a dozen. By which time, Japan would be a different place, divided amongst the Allies to rule.
North Japan will declare itself a socialist monarchy, while the patches of areas under effective western Allied control will probably be consolidated under a new Republican government not unlike the Federal Republic of Germany with heavy emphasis on some sort of deradicalization (not unlike the denazification in Germany) that made the junta so fanatically authoritarian and unreasonable. But this new Republic will be miles behind that of Germany as its infrastructure and population will take decades to rebuild. So no Japanese economic miracle in the 1960s, at least not that early.