The U.S. forces stationed in Japan are called United States Forces Japan in English, and in Japanese they are called the United States Forces in Japan [ This army is a U.S. ** force stationed in Japan under Article VI of the U.S.-Japan Security Treaty. Their headquarters were located at Yokota Air Base in the western part of Tokyo, which was formerly composed of the Allied occupation forces and is now composed entirely of American forces, but the army has no armored units. In fact, the garrison forces do not view the SDF as an imaginary enemy, but rather as a military base in Asia. 
The headquarters of the U.S. forces in Japan is located at Yokota Air Base, which is located in the western part of Tokyo. The U.S. Army plays an important role in U.S. forces in Japan, establishing the Army Command in Japan, where 2,541 officers and men currently serve. In addition, the U.S. Navy, Air Force, and Marine Corps also have their own headquarters and units in Japan. 
The U.S. Navy's naval command in Japan and the Seventh Fleet have a total of 3,740 officers and men, while the Air Force's Fifth Air Force has 12,398 officers and men. The 3rd Expeditionary Force of the U.S. Marine Corps has 17,009 troops. 
In total, there are 35,688 U.S. troops in Japan, who are distributed among various military units and work together to maintain the U.S.-Japan security treaty and the bridgehead of the region.