Hong Kong Express will more flights between Takamatsu and Hong Kong from the current 3 flights per week to 5 flights per week per each direction.
It begins on March 31.
香港エクスプレス航空、高松〜香港線を増便 3月31日から週5往復
https://www.traicy.com/posts/20240316293197/
Recovery of international flights from Takamatsu Airport is the most outstanding in Shikoku Island.
I expect that there will be more destinations.
Busan and Kaohsiung would be potential cities.