izu islands, volcanic island group of japan, political map

izu islands izu oshima japan japanese map island group archipelago nanpo nanpo seven honshu tokyo pacific asia east philippine sea volcanic island tokyo prefecture peninsula sofu iwa niijima miyakejima mikurajima toshima kozushima hachijojima aogashima shikinejima bayonnaise rocks urania ocean volcanoes country mapping atlas overview cartography geography travel destination political vector