Aoshima Island aka Cat Island in Japan

Cat Island known for its large number of feline residents and small number of people.

Felines have been reported by news outlets to outnumber humans by ratios between 6:1 and 10:1, but as elderly inhabitants of the island have died, the ratio has greatly increased, to almost 36:1.

Cats were introduced to combat rodents on fishing boats but remained on the island and reproduced in large numbers