That's about 1,380 acres of land. HUGE...over 2 square miles. (640 acres to the section which is one square mile.Pic and some info on Meiji (Mischief) Island.
That's about 976 acres, almost 1.5 square miles.Pic and info of Subi Island.
Getting this done in as table way, with the necessary underlying soli structure and sea wall supports...and then building all of that infrastructure on top of it.
Those two islands alone are over 2,350 acres of land.
It would be an amazing accomplishment for any one of them...and there are seven of them.