Originally Posted by
nufnuf77
it's possible to do JFK LAX TYO CGK on JAL codes and jal ticket for roughly 2500usd --> if that is of interest. but on the SYD variation only AA codes work. that is why i mentioned this is v appealing to BA which attracts high avios and qualifying tier points earning
Since you're an actual travel agent, do you know what it is that's allowing the AA codes but not JL? The JL fare seems to be more permissive just from myself reading on Expertflyer. I tried it with JL 5 and JL 6 as well (JFK non-stops) to no avail.