Re: US incursion in new Chinese ADIZ: no reaction from China
The crux of this whole issue is two fold:
1) The ADIZ itself and the use of it to defend the Chinese main land or holdings against aggressive posture flights approaching them. With todays aircraft and their speed, clearly seeing something approaching if possible at some distance gives the nation time to respond, warn off the approaching aircraft, and then intercept it if necessary. This is relative common practice, as is the practice of some nations to test that response from time to time.
2) The Island dispute. In this issue, which is really the focal point, the PRC is looking to establish more influence and control in the area around the islands. The Japanese have long administered those islands, and have conducted maritime patrol flights over and around them. They intend to continue to do this. They most definitely will not provide flight plans or transponder information to the Chinese regarding them. The Japanese view such a situation as an escalation away from the current status quo, as does the US.
The US has now tested the ADIZ with military aircraft flying over the island. There was no response. This does not mean that the Chinese now, or in the future will not respond, but it does set a precedent that I fully expect the JMSDF will now also test.
If the Chinese respond against the JMSDF, I expect it to be tense the first time or two and hopefully emotions and knee jerk reactions will not intercede and you will have Chinese military aircraft watching and taking pictures of Japanese military aircraft, and vice versa. If that holds, then a new status quo will develop as both nations use their military aircraft to fly around and patrol the islands. I expect this is the PRC's intent.
The only way to prevent that from becoming the new status quo on the PRC side is to use military force against Japan to keep their aircraft from flying there and claim that sole distinction for the PRC. I do not expect, short of a severe miscalculation, for that to happen. At this point it is not the PRC intent (I believe) to drive the Japanese away from there, just to establish themselves with parity there.
The only way the Japanese can prevent thia new paradigm from happening, is to do likewise. I also do not expect that to happen. I do expect the Japanese will scramble their F-15Js should PLAAF or PLAN J-10s or J-15s intercept their maritime aircraft. This hopefully will be enough "show of force," to satisfy both sides. I do not think either sides wants, or is pushing for, a shooting war.
That being the case, at this time, I really do not see a way for the Japanese to prevent this new status quo from taking effect.