Originally Posted by
anabolism
Yes, "365 days" is clear and not ambiguous, except when a leap year comes into play. If my first flight is, say, February 28, 2016 (a leap year that has February 29), can my last flight be February 27 of the following year, or must it be February 26?
If you call JAL ticketing/reservation office in JAPAN, you can fly on February 28, 2017.