Chichijima (父島, Father Island), formerly known as Peel Island and in the 19th century known to the English as part of the Bonin Islands, is the largest island in the Ogasawara archipelago. Chichi-jima is approximately 240 kilometres (150 mi) north of Iwo Jima. The island is within the political boundaries of Ogasawara Town, Ogasawara Subprefecture, Tokyo, Japan.