How far ahead in advance should I arrive at the airport if the plane is leaving at 4pm?
Answer 1: If your flight leaves at 4pm, I would get to the airport by 1pm at the latest; 12-1pm to be on the safe side. Answer 2: Give yourself 30 minutes to an hour to visit the Quarantine Office at Narita to submit/receive paperwork on your pet. You’ll need to bring the update of shots certificate from the vets and, depending on how many others are there for the same reason, you might have to wait. We got there and were out in 30 minutes (though they had to call our vet and have them fax over the certificates) but then a huge group of people and pets arrived after us. I would not have wanted to be behind them.