Aoshima (青島, Aoshima), also known as Cat Island (猫の島, Neko no shima), is an island in Ehime Prefecture, Japan, known for its large number of feline residents. 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. Felines were introduced to combat rodents on fishing boats, but remained on the island and reproduced in large numbers.
青島(あおしま)は瀬戸内海(伊予灘)海上に位置する愛媛県大洲市(旧:喜多郡長浜町)の島。