With the surrender of 1945, Japan was demilitarized based on the Potsdam Declaration, and the Imperial Japanese Navy was also dissolved. However, at the end of the war, 55,347 moored minesweepers of the Japanese Navy and 6,546 minesweepers of the Allied Forces remained in the waters near Japan. Based on the instructions of the Commander-in-Chief General Headquarters (GHQ), a minesweeping department was set up by the Military Affairs Bureau of the Ministry of the Navy on September 18, and 6 local minesweeping departments and 17 local minesweeping branches were set up on October 10. Then, the minesweeping force was revived. With the end of the war, the Ministry of the Navy was gradually reduced and dismantled, but under the command of Colonel Kyuzo Tamura, the minesweeping unit changed to the Minesweeping Division of the General Affairs Department of the Demobilization Agency and the Minesweeping Supervision Department, and after the Demobilization Agency closed. It was moved to the Minesweeper Division of the Minesweeper Department of the Ministry of the Navy.