Japan's geography made this invasion plan obvious to the Japanese; they were able to predict the Allied invasion plans accurately and thus adjust their defensive plan, Operation Ketsugō, accordingly.
Geografi Jepang membuat rencana invasi ini diketahui Jepang; mereka mampu memprediksi rencana invasi Sekutu secara akurat dan menyesuaikan rencana pertahanan mereka, Operasi Ketsugō.