The mine was once one of the most productive copper sources in Japan, contributing significantly to the construction of the Great Buddha of Todai-ji Temple.
The total length of the underground tunnels across the entire complex reaches approximately 800 kilometers.
Osarizawa Mine serves as an industrial legacy of the Mitsubishi group, which managed the site during its industrial peak.
Parts of the underground gallery are used today to naturally age sake, utilizing the stable cool temperatures.
The site includes a 'Mine Ore Sorting Plant' ruin, a massive concrete structure that stands as a notable example of early 20th-century industrial architecture.
Historic Site Osarizawa Mine is a former copper mining complex in Kazuno, Akita, featuring an extensive underground tunnel network spanning over 1.3 kilometers. Operations at this site lasted approximately 1,300 years, beginning in the Nara period and continuing until the mine's closure in 1978. Visitors can explore the preserved historical galleries, which display mining equipment and life-size dioramas illustrating the working conditions of the Edo and Meiji eras. The site functions as an industrial heritage museum, showcasing the evolution of mining techniques from manual labor to modern mechanization. The constant interior temperature of the tunnels provides a unique microclimate throughout the year.
The illuminated sections of the main tunnel galleries featuring the life-size worker dioramas.
Bring a light jacket or sweater, as the underground tunnels maintain a consistently cool temperature regardless of the outside weather.
Wear sturdy, comfortable walking shoes to navigate the slightly uneven stone and concrete paths within the tunnels.
Plan to spend extra time examining the outdoor industrial ruins, which are often overlooked by visitors focused only on the tunnels.
Do not attempt to stray from the marked visitor path, as the wider mining network is vast and unstable.
Maintain a quiet volume while inside the tunnels and refrain from touching the preserved mining equipment and displays.
