Source: https://www3.nhk.or.jp/news/html/20240109/k10014314211000.ht...
Also it seems like this is a temporary measure (seeing NHK says "対策では当面、事前に出発順は伝えずに離陸許可を出すとしています。" )?
Perhaps it will come back once the non-civilian traffic goes back to pre-earthquake levels?