| Period | Year | Events | |
| Iwami Ginzan reportedly discovered (Ginzan Kyuki). | |||
| Muromachi | Warring States | 1526 | Merchant Kamiya Jutei of Hakata rediscovers Iwami Ginzan (Ginzan Kyuki). |
| 1528 | Ouchi Yoshitaka completed construction of Yataki Castle and takes control of the Iwami mines (Ginzan Kyuki). | ||
| 1531 | Ogasawara Clan of Kawamoto takes possession of the mine (Ginzan Kyuki). | ||
| 1533 | The technique of silver refining by cupellation is introduced to the Iwami mines and filters through to other mines around the country (from historical records). Ouchi Clan captures the mine (Ginzan Kyuki). | ||
| 1556- 1562 |
Struggle over the mine develops between the Mori and Amako clans, which eventually ends in favor of the Mori Clan. | ||
| 1568 | "Silver Mine Kingdom" drawn on a map by Portuguese cartographer Fernan Buez Drad. | ||
| Azuchi- Momoyama | 1585 | Toyotomi Hideyoshi appointed Chief Advisor to the Emperor. Joint control of the mine by the Mori and Toyotomi clans. | |
| 1600 | Tokugawa Shogunate gains possession of the mine after the Battle of Sekigahara. | ||
| 1601 | Okubo Nagayasu appointed the First Commissioner. | ||
| 1602 | Annual silver production reaches 15 tons. | ||
| Edo | 1603 | Yasuhara Bicchu pays 13.5 tons of silver as annual business taxes and is granted an audience with Tokugawa Ieyasu. | |
| 1624 | Total silver output begins to fall (8.2 tons per year). | ||
| 1673- 1682 |
Total silver output further decreases (10 year average: 980 kilos). | ||
| 1675 | Iwami Ginzan downgraded to become subject to governance by the Magistrate. | ||
| 1731 | Ido Heizaemon assumes post of Magistrate. | ||
| 1733 | Sweet potato growing encouraged. Ido Heizaemon passes away. | ||
| 1766 | 500 stone Buddhist statues (25 years in the making) and Rakanji Temple are completed. | ||
| 1800 | The majority of Omori burns down in the Great Fire. The following year the House of the Kumagai Family is rebuilt. | ||
| 1815 | Reconstruction of the Omori Magistrate's Office. | ||
| Meiji | 1869 | Omori Prefecture established (August 1869 - January 1870) | |
| 1872 | Hamada Earthquake results in tunnel collapses. Some of the 500 stone Buddhist statues in the Rakanji Temple are also destroyed. | ||
| 1886 | Fujita-gumi of Osaka establish the Omori mines and commence operations the following year. | ||
| 1895 | Shimizudani Refinery completed. | ||
| 1896 | Shimizudani Refinery closes down and operations are shifted to the Eikyu Refinery. Production shifts to copper. | ||
| Taisho | 1917 | Production is stepped up with increased demand in line with World War One (Silver 4.2t, Copper 477t). | |
| 1923 | A slump in business resulting from falling copper prices in the wake of World War One brings the mine to a close. | ||
| Showa | 1939 | Fujita-gumi Corporation considers re-opening the mines in line with the 1938 Mining Act. | |
| 1942- 1943 |
Attempts at copper mining fail due to severe flooding resulting in equipment loss and flooding of the mines. | ||
| 1956 | Omori Town merged with Oda City. | ||
| 1967 | Iwami Ginzan Silver Mine Ruins designated a historic site by the Prefectural Government. | ||
| 1969 | Fourteen sites (including the remains of the Magistrate's Office, Ryugenji Mabu) are designated as historic sites by the National Government. | ||
| 1987 | Streets of Omori and Ginzan are selected as an Important Historic Buildings Preservation District by the National Government. | ||
| Heisei | 1993 | Oda City starts excavation of the Ishigane District. Remains of mining, refining and other remnants are discovered. | |
| 1996 | Joint study of the Ishigane District by Shimane Prefecture and Oda City started. | ||
| 2001 | Inscribed on Tentative List of UNESCO World Heritage (April). | ||
| 2002 | Iwami Ginzan Site designated as a historic site by National Government (March). | ||
| 2004 | Landscape conservation regulations established in Oda City, Yunotsu Town and Nima Town (July). | ||
| Streets of Yunotsu selected as an Important Historic Buildings Preservation District by the National Government (July). | |||
| 2005 | Iwami Ginzan Site designated as a Mining Prohibition Zone (January). | ||
| Iwami Ginzan Kaido (Tomogaura-do, Yunotsu Okidomari-do), Miyanomae District of Omori Town are designated as historic sites by the National Government (March). | |||
| Ginzan Sakunouchi, Gohyakurakan, Rakanji Temple, Tomogaura, Okidomari are designated as historic sites by the National Government (July). | |||
| The towns of Yunotsu and Nima are merged into Oda City (October). | |||
| 2006 | Nomination Dossier submitted to UNESCO (January). | ||
| On-site mission by ICOMOS. | |||
| 2007 | Recommendation for ﾒdeferralﾓ given by ICOMOS (May). | ||
| Officially registered on the World Heritage List (July). | |||
