Which has no impact on A inventory on NRT-JFK flights. Obviously part of the problem, but not really salient to the OP's question. What causes his lack of A is not the domestic Japan A availability, but rather the lack of A because it isn't set up in the system for the Oneworld purpose. I am really surprised at how many things JL had failed to complete by April 1 as part of joining OW, they really should not have joined until 6 months later when the work was completed. Just goes to show how desperate both OW and JL were in getting the alliance going.