At that time, the deployment of major IJAAF units in Tokatsu Region of Chiba Prefecture were: In June 1945, the advanced echelon of the 18th Air Combat Group withdrew from the Philippines by heavy attrition in the Battle of Luzon.

Immediately upon arrival in Japan, they joined with the rear echelon which consisted of 36 aircrews and 46 Ki-100s, and on 19 June 1945 the group reassigned to Matsudo Airfield for air defense missions over the Kanto Plain area.

On 30 October, an artillery battery of the 112th Cavalry Regimental Combat Team which seizing Kashiwa Airfield was sent elements in to relieve the occupation troops at Fujigaya.

In 1959, joint use agreement between USAF and Japan Maritime Self Defense Force was established at Shiroi, and JMSDF ground service crew training unit activated in place.

Afterward, the JMSDF Fleet Air Force Headquarters activated at Shimofusa, then the base became an important facility for anti-submarine patrol aircraft's operations in Japan.