| 1593 | Sadayori Ogasawara, the lord of Shinshu-Matsumoto, found the islands. |
| 1675 | Edo-bakufu, the Tokugawa shogunate, sent the first expedition team. |
| the 19th century | Whaling ships called for water supply. |
| 1827 | The U.K. warship Blossom called. They declared the possession. |
| 1853 | Perry, the U.S.fleet Commander-in-Chief, touched. He nominated an immigrant from Hawaii as the head of Bonin Islands. It led to the dispute between U.S and U.K.. |
| 1861 | Edo-bakufu sent the second expedition team. They sent immigrants from Hachijyo-island. |
| 1876 | Tha Japan government got other countries' consents and declared the posessesion. |
| 1880 | They belonged to Tokyo Prefecture. |
| 1882 | Immigrants from U.K, U.S. and Canada were naturalized as Japanese citizens. |
| 1886 | In Chichijima-island the Ogasawara Islands Office was founded. |
| 1926 | The Ogasawara islands office was changed the named to the Ogasawara Branch Office. |
| 1941- | All 7700 residents moved to the mainland of Japan to keep away from the battlefield. |
| 1945 | The end of WW2. The islands were ruled by the U.S. Government. |
| 1968 | 26-June, the restoration to Japan. Ogasawara Village (Tokyo Metroporitan area) was organized. |
| 1972 | Ogasawara National Park was designated. |
References
1. Encyclopedia Nipponica 2001 Vol.4 (Syougakukan,1994)