Earlier quoted context omitted.
Japan built an island for the Kansai airport. Construction started in 1987 and the airport opened in 1994. Japan have a host of "long term big engineering projects" they're always working on.
I flew in and out of there the first time I visited, it was so cool. Japan is an infrastructure nerds dream. It didn't feel like being on an island at all, since it's entirely developed. But once you hop on a train you shoot out across the ocean and it's quite spectacular. I recommend going up to the viewing tower if you have time before your flight, it's an inimitable view.
10/10