12 air fleets and 260 fighters are maintained and, aerial refueling and transport troops have been newly established.(JASDF[Japan Air Force])

Fighters can be called the central core of air defense. JASDF fighter troops are comprised of 12 air fleets and about 260 fighters in order to quickly respond to various situations. For the immediate and appropriate measures during an airspace incursion, etc., 7 new fighters will replace the F-4 as part of the new-mid-term defense plan, while considering the financial conditions. Also, since Japan is geographically made up of many islands, in order to appropriately handle an invasion to these islands, transport aircraft (C-X) will replace C-1 aircraft, rescue helicopter and C-130H transport aircraft will be equipped with aerial fuel-receiving and refueling functions, and the aerial refueling and transport troops will be newly established with the deployment of aerial refueling and transport aircraft (KC-767).

http://www.mod.go.jp/asdf/en/mission/boueiryoku.html