Iwo Jima named back to Iwo To.....what?

So...Iwo Jima used to be called "Iwo To" back before the war and there were about 1 thousand people living on the island. Now, the Japanese have renamed it back to Iwo To because the people who used to live there began complaining about it after the release of the two Clint Eastwood films including the island. I'm like...what? Most if not all of those original thousand people have got to be dead by now.