First time travelling to Japan. While in Japan I am trying to book a ticket through Japan Airlines(JAL) from Hiroshima to Tokyo but in one of the text field its asking for an international ticket number, I have an international ticket from Sydney to Osaka and Tokyo back to Sydney booked via China Southern. My concern is I can see alot of post around forums that they do some eligibility after booking non-refundable tickets. So just want to make sure this prior to booking.
-Shall I just enter the China southern ticket number from my Sydney-Tokyo flight?
-Do I need to print my international ticket and show at the airport? Or is there any other thing that I need to be aware of before booking a domestic flight?
I wasn't able to find the information from their official website. Any experienced travellers?
Thank you.