The closing prompt is explicitly counterfactual rather than a claim about an operation that occurred. Tokyo and Sapporo lay within roughly a thousand nautical miles of Vladivostok, making bombing or maritime minelaying conceivable on range alone. Mining key Japanese ports could have imposed a naval problem even if the aircraft were not used as conventional heavy bombers. The question is whether such an offensive would change the war's outcome or, more plausibly, the operational lessons learned by the Soviet Union and Japan.
Notable Point · 44:17-45:58
Vladivostok opens a 1939 minelaying counterfactual
The open question asks how bombing or mining Japanese ports from Vladivostok might have changed lessons drawn from the 1939 conflict.