Originally Posted by
armagebedar
You cannot check-in for a flight at the airport the day before your flight. The last NH flight departs HND at around 01:00; the first departs at 08:40. For all intents and purposes, check-in from 06:25 to 01:00 qualifies as "all day".
https://www.ana.co.jp/en/ch/internat...nter/open.html
Respectfully, it is much less confusing to say 0625-0100 (or 2500) rather than "all day". When I read your OP in this thread, I inferred that the check-in counters were open 24 hours, especially with your comment "as early as you would like".