"The end of the war was near in August 1945 but not at hand. Surrender would not have occurred in August 1945 without the use of the atomic bombs. The war throughout Southeast and East Asia would have continued. The Soviets would have invaded Hokkaido and split Japan like Korea was sadly split. Korea would have fallen completely to Soviet domination. Japanese and Asian civilians throughout Asia would have died and been killed on a daily basis while surrender was postponed to some time in the late fall or winter 1945. Hiroshima and Nagasaki would have been fire bombed instead of incinerated."
http://hnn.us/articles/180.html
I've learned about this when i was in estonia. It is said that Soviets also invaded manchuria, japananese occupied lands and killled about 30,000 japanese civilians, including the japanese soldiers and also the chinese. Soviets kept advancing through south untill the northern part of Korea (North Korea) present time, and South korea was already occupied by the american forces.
Here is another link about invading Soviet forces deep into southern east asia
http://www.geocities.com/atruephile/atomicbomb.html
http://www.worldwar2database.com/html/ussr.htm
My question is, does japanese people know that people who were in southern parts of china were brutually excuted by the soviet army? By the way, it is also said that Joseph Stalin has been secretly kept this information within KGB intelligence not to leak it. Untill now by the russian news reporters, journalists.
If the soviets could have invaded northern parts of japan, japan probably've in situation just like North and South korea.