I've been monitoring JAL F award closely for about 2 months. In the past usually availability was pretty good T-14. But since about this week, I noticed there's almost 0 F availability all the way to T-14 (from today to Mar 21st for example only one day has F available). I verified using BA site and Alaska site. Has anyone noticed the same? I suspect JAL is blocking or refusing to release F award for mid-late march because of the cherry blossom. I also noticed the business class has been consistently full (or close to full) coming in to mid-late march. Could that be the reason as well?

I currently have 2 J awards ticketed, hoping to upgrade to F. I will keep checking but would appreciate any insights!