The Soviets don't declare war in Japan on Aug 8. months after the war in Europe is over and only under pressure and due to agreements made earlier. Any casualty estimates?The general consensus seems to be the Soviet invasion would be a successful, but at a brutal cost. Discussing the Invasion of Hokkaido in 1945 seems pointless considering they surrendered in August and any realistic invasion would take place afterwards. However, following occupation of the Dutch East Indies and French Indochina by Japan, the UK declares war on Japan. The Soviet Pacific Fleet had essentially zero amphibious capability, the only way they could have landed in Hokkaido in fall 1945 was to pull freighters/passenger ships up to a regular pier, and they would have a very limited ability to unload vehicles, let alone armor, from these ships to a dock unless there were working cranes (and personnel to work them) where they pulled in.
They, like pretty much anyone in the world short of USMC, simply lack the sufficient amphibious and airborne assault assets to put strong enough soldiers on the ground in a short time period. However, I cannot personally verify this information as the sources are all in Russian.TL;DR I am in need of information on the planned Soviet invasion of Hokkaido and what the aftermath would be. Without America as a driver, fighting in both Europe and the Pacific, I'm not sure those agreements come to exist.The Soviets just can't invade Hokkido without American help, at least in a reasonable time span.
I am aware that the USSR had plans for an amphibious assault on the small port of Rumoi.