Kami-san-to

Japanese: 上三島 - かみさんとう

...The Tokara Islands, located between Kyushu and Amami Oshima, consist of the islands of Kuchinoshima, Nakanoshima, Gajiyajima, Heijima, Suwanosejima, Akusekijima, Kodakarajima, Takarajima, and Yokoatejima. In the past, they were called the Lower Seven Islands, and from the mid-Meiji period until 1946, they formed the Juto Village along with the Upper Three Islands (Iwojima, Kuroshima, and Takeshima, present-day Mishima Village). In the same year, the Lower Seven Islands were taken over by the U.S. military and placed under the control of the Provisional Northern and Southwest Islands Government (later the Amami Islands Government).

From [Mishima Village]

...Since the Middle Ages, this area has been the site of many exiles, including Shunkan, who was sent to Iwo Jima (Kikaigashima), and has many historical sites, including Shunkando. Formerly known as Kami-Mishima, it and Shimo-Shichito, which are now part of the Toshima Village area, formed part of the Oshima District's Jitsuto Village in the mid-Meiji Period. In 1946, Shimo-Shichito were taken over by the U.S. military, and so Kami-Mishima alone made up the Toshima Village.

*Some of the terminology that refers to "Kamimishima" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…九州と奄美大島の間に位置する吐噶喇（とから）列島の口之島，中之島，臥蛇（がじや）島，平島，諏訪之瀬島，悪石（あくせき）島，小宝島，宝島，横当（よこあて）島などの島々からなる。古くは下七島と称され，明治中期から1946年まで上三島(硫黄島，黒島，竹島。現在の三島村)とともに十島（じつとう）村を形成していたが，同年に下七島はアメリカ軍に接収され，臨時北部南西諸島政府(のち奄美群島政府)の支配下に置かれた。…