Fees? Let me see if I understand you right. You fly the first leg(s) and simply don’t fly the rest of the leg(s) back? Do you expect to get money back? If not, sleep well, you certainly won’t be charged any extra. It may be news to some, but an airline or any company cannot charge your credit card without your permission. If you expect to be able to get a refund on the unused segments, then you very well may get A. No refund or B. A refund minus a fee. How about you call ANA our your agent and just ask them?