I'm sorry if this has been answered, but I searched. I couldn't get a clear answer.
This thread has a clear answer.
This is a very common question. Here are some recent threads on the topic.
It's not /r/AskHistorians, but our flaired user /u/restricteddata does a good job of wading into the debate in this /r/badhistory thread
http://www.reddit.com/r/badhistory/comments/21pvdt/lhf_japan_was_trying_to_surrender_before_the/
Overall, If you mean before Japan was ever bombed at all, no. Remember, there were months of firebombings before the atomic bombs were dropped. At least 67 cities were hit.
If you're referring to the atomic bombs, then yes...kind of. Members of the Japanese leadership made overtures to the Soviets in hopes of negotiating a conditional surrender. They never got much of a response out of the Soviets, so it is difficult to say how serious those overtures were, especially in light of the fact that there was a lot of division in the Supreme War Council. Moreover, there was very little chance that they would have actually gotten the USSR's support, and the kind of settlement they had in mind would have been unacceptable to the allies.