チェジュ航空、日韓路線拡大 札幌/千歳・大阪/関西〜務安線など
Jeju Air opens new air routes between South Korea and Japan (Sapporo〜Muan, Osaka〜Muan)
https://www.traicy.com/posts/20231020281414/
Muan is the airport suffering from getting flights. So, revival of international flight routes departing or arriving at Muan must show how many people move between Japan and South Korea.
