No, you are right we did not drop 200,000 we dropped 350,000 troops in thier lap.
On September 2, Japan formally surrendered, signing the Japanese Instrument of Surrender, and the occupation began. Allied (primarily American) forces supervised the country. General MacArthur was technically supposed to defer to an advisory council set up by the Allied powers, but in practice did everything himself. His first priority was to set up a food distribution network; following the collapse of the ruling government, and the wholesale destruction of most major cities, virtually everyone was starving.
Douglas MacArthur and Emperor HirohitoOnce the food network was in place, at a cost of up to US$1 million a day, MacArthur set out to win the support of Hirohito. The two men met for the first time on September 28; the photograph of the two together is one of the most famous in Japanese history. With the sanction of Japan's reigning monarch, MacArthur now had the ammunition he needed to begin the real work of the Occupation. While other Allied political and military leaders pushed for Hirohito to be tried as a war criminal, MacArthur resisted such calls, arguing that any such prosecution would be overwhelmingly unpopular with the Japanese people.
By the end of 1945, more than 350,000 US personnel were stationed throughout Japan.
Heres the link if you want to read more:
http://en.wikipedia.org/wiki/Occupied_Japan#The_end_of_the_occupation