Home to more than 120 feral cats, Aoshima Island has no stores and no cars. It has one ferry, running twice per day, carrying a limit of 34 daily visitors. The cats were first brought to the island to deal with the mouse population that would swarm fishing boats. According to the Japan Daily Press, the feline population began to increase about a decade ago when the human population declined and there wasn't anyone to keep the cats from breeding. Today, as few as 10 of the cats are neutered.
Source: Reuters via The Washington Post and Japan Daily Press
