Originally Posted by
Tokyoite
Um, they accept home print-outs for check in, and then reissue the proper boarding pass. International departures, not domestic!
FYI, I work for an organization very close to airport operations, and know the rulebook.....
Back to topic, the biggest impediment would be that KA check in counters may not be open the night before...
Experiences reported here seems to indicate that the rulebook is (very unusual for Japan) not followed strictly. Last post The one I could find, but I have seen other examples.
https://www.flyertalk.com/forum/japan/1828026-earliest-entry-hnd-access-royal-park-transit-hotel.html