| 1．Udone-shima |
| Udone-shima (鵜渡根島) is a volcanic, deserted island located in the Philippine Sea approximately 150 kilometres (93 mi) south of Tokyo in between Toshima and Nii-jima, in the northern portion of the Izu archipelago, Japan. |
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| 2．Jinai-tō |
| Jinai-tō (地内島, Jinaijima) is a volcanic, deserted island located in the Philippine Sea approximately 220 kilometres (140 mi) south of Tokyo and offshore Niijima, in the northern portion of the Izu archipelago, Japan. |
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| 3．Shikine-jima |
| Shikine-jima (式根島) is a volcanic Japanese island in the Philippine Sea.[1] The island is administered by Tōkyō and located approximately 160 kilometres (99 mi) south of Tōkyō and 36 kilometres (22 mi) south of Shimoda Shizuoka Prefecture. It is one of the Izu Seven Islands, group of the seven northern islands of the Izu archipelago. The island is the smaller inhabited component of the village of Niijima, which also contains the larger, neighboring island of Niijima and the smaller, uninhabited Jinai-tō. It is part of the Ōshima Subprefecture of Tokyo Metropolis. As of 2009[update], the island's population was 600. Shikinejima is also within the boundaries of the Fuji-Hakone-Izu National Park. |
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