JSDF/Japan Self Defense Force is the combine Army, Air Force and Navy of Japan yet it is simply called JSDF. They do not refer planes under the Japan Air Force nor the gray ships as Japanese navy. You have to insert the “self-defence” in its branches ( ground self defence, air self defense, maritime self defense). Whats the catch? The USA. After WorldWar 2, the US, the victor both Europe and Asia, made a treaty preventing Japan from creating a revival of Japanese might.
But in the 1980s, its Self Defense force is bigger than the United Kingdom. Its newest and biggest ship, the Izumo and Hyuga class Helicopter Destroyer (the biggest destroyer that looks like an aircraft carrier) is almost as big as the British fleets Queen Elizabeth and qualified for VSTOL jets like the F35
But Japan is the closest force that stand against China. Although Japan does not possess any nuclear weapon, it could upgrade its inventory in a few months.
Japan is also helping the Philippines in its maritime problem with China and gave two patrol ships to the Phil Navy and would also design future vessels. These scary bully tactic of China is really a security problem in the region especially for the Philippines who have no naval power to deter China.
Thank you Japan, may you keep the balance of power in Asia. Once you were an enemy now you are a friend and deterrent to an ambitious dragon.