In November 1943, the six subprefectures were merged into "eastern," "western" and "northern" subprefectures, which remained in place until the Surrender of Japan in 1945.
Pada bulan November 1943, keenam subprefektur digabung menjadi subprefektur "timur", "barat", dan "utara", yang tetap ada sampai menyerahnya Jepang pada tahun 1945.