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Administratively, the Volcano Islands, Nishinoshima (Rosario Island), Okinotorishima (Parece Vela) and Minamitorishima (Marcus Island), are today part of Ogasawara municipality. It is a Subprefecture of Tokyo Metropolis. Geographically, they are not traditionally considered part of the Bonin Islands, which are the Mukojima, Chichijima, and Hahajima island clusters. In other words, the historical range of the Bonin Islands ("Ogasawara Guntō") is not the precise equivalent of the Japanese governmental unit. The Bonin Islands is a geographical term excluding the other islands which are today associated within the boundaries of a collective term, "Ogasawara Shotō."