Hope this helps: some of us had NRT-YYZ changed to HND-YYZ with a 3 hour connection (which required a ground airport change at our own expense) Several of us whom communicated outside of this thread had been able to avoid the chane of airport to HND by accepting other same day routings from NRT.
NOW! The posts TODAY above mention an OUTBOUND YYZ-HND change (I assume from AC1 YYZ-NRT) Please advise..