As I wrote about earlier, Cathay Pacific are canceling all flights to Japan effective March 9th and 13th until March 28th.
I have taken a look at Hong Kong Express booking website, and based on the unavailability of flights it seems like they are also canceling all flights between Hong Kong and Japan until March 31st – at least you cannot book any tickets to Japan during this period, so it seems they are all canceled as well – making it very hard to travel between Hong Kong and Japan for those who might be on holiday either place and want to go home…