The ability to go through security in about 1 minute and the fact that you can arrive at the airport a half hour before your flight and still be airside before boarding makes Japan the country with the best domestic flight experience in my book.

Sure, in the USA or China, which is the absolute worst experience, you can buy a meal and drink after security but you need to arrive 1.5 hours before your flight so they can check every part of you and your luggage a few times before they let you into the departure area.