Looking for some advice. A friend is flying Sydney to Narita and booked as 2 separate flights, Sydney to Cairns and Cairns to Narita. Same flight numbers as the direct Sydney to Narita flights, but will there be issues with luggage customs etc? I've done these flights before and I seem to remember everyone had to collect their bags in Cairns and take them to the international terminal to get through security customs etc. Rookie mistake