It took some digging through maps but here are the answers.
The top link picture I believe is the airport for Kerama Island but the airport is actually located in Sotochi Island. (geographic Japanese characters have different reading but I believe that is it)
The middle one is Shimojijima. It was the easiest. The runway length is 3000m for practice touch & go with real large aircraft. NH
have bases there.
It may also be an alternate field for the NASA space shuttle.
The bottom link is Yoron Island airport.
Looks like you had a good weather over the Ryukyu Islands.