All Nippon Airways cancellation fees from $100 to $500 apply if you request a ticket cancellation after 24 hours for risk-free cancellation. According to ANA Cancellation Policy, if you cancel an All Nippon Air flight within 24 hours of your scheduled flight departure, a fee of $100-$400 will be charged as an All Nippon cancellation fee. It is also possible to request a cancellation after canceling the ticket.

All Nippon Airways is responsible for delays and is legally entitled to compensation in any of the following cases: Exchange flights delay arrival by more than 2 hours. All Nippon Airways flights were canceled within 14 days of departure.

All customers will have 24 hours from the time of their original booking to cancel their All Nippon Airways reservation without being charged the All Nippon Airways cancellation fee, regardless of the fare selected.
https://www.cancellation-policy.com/ana-cancellation-policy