I bought tickets from Japan Airlines (JAL), the details as per below:
Day 1: From Penang to KL and change flight to Tokyo Narita
Day 15: From Osaka Itami to Tokyo Haneda, then fly from Tokyo Narita to KL and back to Penang.
My question is, after I checked in my luggage in Osaka Itami airport and fly to Haneda, do I still need to do luggage transfer between Haneda and Narita airports?