Japan is accelerating its military normalization process by building up its offensive capabilities, especially those of its Japanese Air Self-Defense Force (JASDF). As a part of that push, the United States on Oct. 29 granted Japan's request for a major upgrade to its F-15J fighter aircraft. Installing advanced radar and cruise missile capability on 98 JASDF jets will mark a crucial step in Japan's move away from its post-World War II pacifist stance. And while the upgrades will enhance Tokyo's options, maintaining Japanese national defense as the country's aerospace industry declines and the regional threat environment — including an expanding Chinese military — becomes more complex will become increasingly difficult. From Defense to Offense Since its founding in 1954, the JASDF has focused on developing potent air defense and anti-ship capabilities.