Not sure why you're being downvoted, this is widely accepted that both the bomb and the soviet invasion had equivalent weight in their surrender, with some historians saying the soviet declaration of war was more important.
To add on that, at the time of the surrender, the long term effect of the bomb was not known to the japanese and as such the nuclear bombing wasn't the worst city bombing they suffered, neither in terms of infrastructure damage or loss of life.
To add on that, at the time of the surrender, the long term effect of the bomb was not known to the japanese and as such the nuclear bombing wasn't the worst city bombing they suffered, neither in terms of infrastructure damage or loss of life.
Some more information for those interested
http://www.reddit.com/r/AskHistorians/comments/u6qqo/there_h...
http://www.reddit.com/r/AskHistorians/comments/2y98yc/did_th...