Toi Gold Museum, Mining museum in Toi, Izu, Japan

The Toi Gold Museum is a mining museum in Toi, Izu, Japan, located on the grounds of a former gold mine. Exhibits display ore samples, traditional tools, and mining techniques, while visitors can also explore an underground tunnel and try gold panning activities.

The Toi Gold Museum stands beside the Toi gold mine in Izu, Shizuoka, and presents gold mining in Japan from ancient times to the modern era. Its displays reconstruct the gold manufacturing process of the Tokugawa period, show artifacts from that era, explain gold processing, and gather gold ores from sites across Japan. The museum also holds the world's largest manufactured pure gold bar, 250 kg at 99.99% fineness, certified by Guinness.

The museum presents mining traditions through automated dolls in a 400-meter tunnel, showing how both men and women worked side by side during operations and what their daily tasks involved.

Underground tunnels are open to visitors, and gold panning is an activity you can do on-site. Wearing comfortable shoes is recommended since you will walk through cool tunnels where conditions remain similar throughout the year.

The 250-kilogram bar inside is certified by Guinness World Records as the largest manufactured pure gold bar, with a fineness of 99.99%. In 2016 it was valued at about 1.1 billion yen (US$9.7 million). A yellow banner outside the building reads "世界一巨大金塊" and invites passers-by to touch the gold.