Hello

Total noob when it comes to all that is Japan.

Is there an issue when arriving in Japan if I'm not sure if my return ticket yet?

I plan to book last minute Aeroplan Award tickets and I usually only know a day or so before we return home to get the least expensive F/I/J class, so if I plan to stay two weeks in Japan I'll not have an idea of my return until a few days before.

I'd hate to purchase the outbound only to be denied entry at HND/NRT.

Thank you for any information you can provide.