After logging in, you can go to “My Page” in the “Menu” and register your ANA Number via the “Member Information” edit screen.
How to register is as follows.
① After logging in, select "My Page" in the "Menu" and then select "Member Information".
② Click the "Edit" button at the bottom of the Registered Member Information screen.
③ Turn on "Register/Change ANA Mileage Club Customer Number" at the bottom of the editing screen, and an input field will appear. Enter your ANA Number and Web Password, then click the "Update" button.