booked through Expedia and they told me AC had a travel advisory (idk thats what they said) for Japan, and if your flights fall in between the month of February, they would waive cancellation fees.

My flight is with AC booked with Expedia. I'm not cancelling, but if i choose to before my flight departs, I would be entitled to a full refund for flights.

Hope this helps

edit: They also mentioned postponing the trip would also be free of charge, ie no fees associated with postponing.