While waiting for my next appointment, I decided to look over at the roll calls to see just how many people have reported being canceled. There have been cancellations on October 12, October 24, November 5, March 4, March 16, March 28, April 9 (3)
One poster reported that they had six cabins booked (linked) and three were canceled
Some were guarantee cabins but some had specific state rooms. At least one reported that he was elite plus.
Some booked quite a while ago, others more recently
And two people reported being told that the ship would not be going to Japan this year at all.