You are pushing us closer to that pact, let see the Phillipine act ... why you dont imagine the same happen to Vietnam.
Japan, USA is more than welcome to have the positive response in building an alliance against China ...
I think, that's too much problem created for China to handle those 2 countries ... more enemies really not good ...
Viet Nam either China enemy or friend, US dropped 2 nukes on Japan and later become allied. Friend or foe will change with time. Phillipine and Japan allies without US military support won't stand a chance in the future conflict with China. Fact US is the only power in Asia can balance China military assertion.