Interesting analysis. My flight was late August, but I certainly didn't want to wait and see if it was viable. So thanks for the prompt warning. I cancelled within the 24 hour window. As you suggested there were many possible alternate routings, but google flights was only showing a few of them. AA showed many more. All the ones on my first choice of dates showed the "Oops, one or more of your flights is no longer available" when I tried to book on AA, so I guess the NRT-CGK leg was gone on Aug 29. In any event, we are booked JFK-CGK-JFK in J on my second choice of dates for about $2700 each. Now I guess I will enter the "how do you reserve seats on JAL" issue.