In Focus shows A Visit to Aoshima, a Japanese 'Cat Island' "Aoshima Island is one of about a dozen 'cat islands' around Japan, small places where there are significantly more feline residents than people. In Aoshima more than a hundred cats prowl the island, curling up in abandoned houses or strutting about in the quiet fishing village. Cats outnumber humans six to one on the island. Recently becoming popular online, tiny Aoshima has seen a steep rise in tourist visits, overwhelming the handful of permanent residents."
I'd never heard of this.