General Oda explains if armed jetfighters meet within missile range, it could become a hair-trigger situation. The Chinese PLA-AF jetfighters usually keep within a regulated distance from Japanese jetfighters to show peaceful intent. Until the event reported by General Oda PLA-AF fighters had not flown south into Japanese airspace over the East China Sea and had not assumed a hostile stance against a Japanese Air Force fighter [probably scrambled from Okinawa].
But, this time, conditions totally changed. At least one PLA-AF fighter rapidly crossed into Japanese airspace over the Senkaku Islands (see red circle on map below) and showed an attacking behaviour against a Japanese jetfighter. The Japanese fighter avoided the attacking behaviour using a defencive manoeuvre. As the Japanese pilot judged he would be involved in dogfight with unforeseen consequences he withdrew and avoided possible air-to-air missile attack by using self-defence systems.
In writing this account General Oda, a former fighter pilot, well understands how serious the situation was and the need for immediate action. Such aggressive Chinese behavior had not been even experienced during the Cold War (around 1950 to 1992) and was the first-ever dogfight involving the modern Japanese Air Force.
If PLA-AF and Japanese fighters, equipped with missiles and aerial cannon, are involved in dogfights, a collision of fighters or firing of missiles is possible.
Pilots of the Japanese Air Force are strictly controlled and disciplined - so do not fire air-to-air missiles prematurely. But, pilots of the Chinese PLA-AF are relatively inexperienced - making their behaviour unpredictable.
China has been seeking a chance to establish effective control of territorial waters and airspace of the Senkaku Islands using jetfighter and PLA-N warship incursions. Now, China judges that she has the right to do so.
This situation is extremely serious. Of course, it has also been reported to the Japanese government. But, perhaps because of the difficulty of understanding its seriousness, Japan does not seem to have taken diplomatic action. So it has not become news. This unnecessary and dangerous Chinese provocative behaviour did not happen sporadically or accidentally, and it still continues. This is problem.
Now China, having crossed the line, has seen the lack of action by the Japanese government with respect to aggressive Chinese behaviour.
Serious confrontations in the sky will follow. They may not remain limited to confrontations, kept secret, between jetfighters. Dangerous provocative behaviour by the Chinese PLA-AF in the sky should be quickly announced and publically revealed to the international community - as it is a threat to international peace.