What was the Manchukuo government?

In 1931 Japan invaded Manchuria. To cover up their invasion, the Japanese imposed a new "puppet" government (a government controlled by them) that was meant to approve their presence in Manchuria. The name of Manchuria changed to Manchukuo and therefore so did the name of the government. The League of Nations sent a commission to investigate whether or not the Manchurians really wanted the Japanese there called the Lytton Commission. They determined that, in fact, the Japanese were not welcome in Manchuria. This basically eventually lead to the Japanese withdrawing from the League of Nations.