for those with still-open CMB plans, you may want to consider issuing XONEX tickets from Japan. I was due to fly into CMB on apr 29th, pickup my DONE4 and fly out on May1st. of course, i couldn't get into CMB (i was in BKK at the time). i rerouted myself to NRT, showed up at AA desk at the airport explained my situation and next day had a new DONE4 issued. of course, the pricing was ex-NRT, but it's only about $500 difference. for me, it's really worth not having the headache. i consider myself lucky that CX cancelled when i was going INTO CMB, not when i was there.