If you plan to request a refund for a delayed/canceled flight and you are not going to be able to catch your connecting/return flight (i.e., itinerary to return to the departure location or in its direction), you will also be able to request a refund for the latter in line with the abovementioned points.
In this instance, please make your refund requests for the delayed/canceled flight and the connecting/return flight at the same time.
Depending on the details of your change or refund request, ANA may contact you to confirm the circumstances.