Japan Airlines
JAL Mileage Bank status is earned on FLY ON Points or qualifying flights in a calendar year on JAL and oneworld carriers, alongside the lifetime Life Status scheme introduced in 2024; JAL Global Club membership keeps Sapphire-level benefits for the long term. Japan Airlines is a oneworld member, so Sapphire is oneworld Sapphire and JGC Premier and Diamond are Emerald. Confirm current thresholds on jal.co.jp.
5 rungs, from the bottom up.
Qualification thresholds are the published ones as last checked and change most years; confirm the current numbers with Japan Airlines. Alliance equivalences and the lounge rules that follow from them move far more slowly.