I just purchased an itinerary on Malaysia Airlines website from YVR-NRT-KUL-LGK and return. The YVR-NRT segments are operated by Japan Airlines. The Malaysia Airlines website doesn't allow seat selection on the Japan Airlines codeshare flights. I called Japan Airlines, and they say that since the ticket was purchased from Malaysia Airlines, they can't assign seats, and that I have to call Malaysia Airlines. I called Malaysia Airlines, and they say that they are not able to assign seats on Japan Airlines. I want to get good window seats, but I can't seem to find anyone who can actually assign the seats, so unless I can get this fixed, we'll probably end up in the middle of the plane if we have to wait until airport check-in. Does anyone have any idea how to get these seats assigned?