Here is how ANA describes their frequent flyer offerings - "You can get mileage not only by using flights of ANA, Air Nippon and other tie-up airlines, but also by various activities such as shopping, eating meals, joining tours or using hotels or rental cars provided by ANA's tie-up companies." I am assuming that tie-up is another way of saying partner.
ANA Mileage Club
phone #800-262-4653

