This flight gets delayed a lot because it's scheduled for 1:05 AM (probably to secure the slot in HKG) but that means that the actual average flight time of 3.5 hours (vs. the block time of 4) has it arriving in NRT at 5:30 AM which is within the 12-6am landing curfew. It almost always gets 'delayed' to 1:30 ~ 2:00 AM departure based on recent data and still arrives just after the 6am curfew ends. Which (as I've stated before) is another reason I avoid this flight.