Chyornie Bratya (Russian: Чёрные Братья;Japanese: 知理保以島) is collectively the name for a pair of uninhabited volcanic islands located between Simushir and Urup in the Kuril Islands chain in the Sea of Okhotsk in the northwest Pacific Ocean. The larger of the two is named Chirpoy, and the smaller is named Brat Chirpoev (Russian for Chirpoy's Brother).