They did pull some troupes, but they still had a huge number of troupes in the East. Given the limits of the Imperial Japanese Army in that theater (logistics,

They did pull some troupes, but they still had a huge number of troupes in the East. Given the limits of the Imperial Japanese Army in that theater (logistics, modern mobile army) it is hard to image how they could have made significant progress. Specifically after they had totally lost in 1939.