There are only very limited number of JMB partner carriers. If you can pick, which one you wish they could add to their partner list? Here is my wishlist KE: Provide a lot of connections to Japan and a codeshare partner with JL. But they are in general much cheaper than JAL. Maybe that's a reason why JAL doesn't want to add them as a JMB partner? AS: Better serve US west coast than AA JQ: They codeshare with JL already but I guess if you can earn miles on JQ coded flights, that will give you less reasons to buy the probably more expensive JL coded ticket Thoughts?