Four Major Routes of the Iwami Ginzan Kaido
The Iwami Ginzan Kaido consisted of several routes that were used according to their destinations and historical circumstances. Four major routes are particularly associated with the transportation network that supported the silver mine.
Tomogaura Route and Yunotsu-Okinoura Route
The Tomogaura Route was established in the first half of the 16th century and is considered the oldest of the major routes. It provided the shortest connection from the silver mine to a port on the Sea of Japan, allowing silver ore to be transported efficiently to the coast.
The mountain route is approximately 7.5 kilometers long and includes numerous steep sections. Even today, parts of the trail retain the atmosphere of the historic road, allowing visitors to imagine the difficult journeys once made by people transporting silver through the mountains.
The Yunotsu-Okinoura Route was developed during the latter half of the 16th century. In addition to transporting silver, it served as an important supply route for bringing goods and materials to the mining area.
Compared with some of the other historic routes, sections of this road are relatively well maintained and are now used as hiking trails. The Tomogaura and Yunotsu-Okinoura routes are both included among the components of the UNESCO World Heritage Site Iwami Ginzan Silver Mine and its Cultural Landscape.
Onomichi Route and Kasaoka Route
The Onomichi Route was developed as a long-distance transportation route during the Edo period. Extending approximately 130 kilometers, it connected the silver mine with Onomichi on the Seto Inland Sea.
From Onomichi, silver could then be transported by ship toward major cities such as Kyoto and Osaka. This route therefore connected the remote mining region with the wider commercial network of Japan.
The history of the Kasaoka Route is less clearly documented, but it is generally understood to have branched from the Onomichi Route and continued toward present-day Okayama Prefecture. It is thought to have been used not only for transportation but also for administrative and commercial purposes.
From the Medieval Period to the Edo Period
The Development of the Silver Mine and Early Transportation
Iwami Ginzan began to be developed on a large scale in the early 16th century. The mine became widely known after its value was recognized by Kamiya Jutei, a merchant from Hakata.
In the early years, silver was transported primarily toward Hakata, making the Tomogaura Route particularly important. As silver production increased, so did the need for efficient transportation routes.
The introduction of the cupellation process, known in Japan as haifukiho, greatly improved silver refining and contributed to a significant increase in production. The development of the Yunotsu-Okinoura Route took place against this background of growing demand for transportation.
A Large-Scale Transportation Network in the Edo Period
Following the Battle of Sekigahara, Iwami Ginzan came under the direct control of the Tokugawa shogunate. Silver transportation was consequently placed under strict official supervision.
The Onomichi Route in particular was developed as part of a large-scale transportation network designed to move silver safely and efficiently over long distances. The shipments were carried out according to strict regulations.
Historical accounts describe large transport groups consisting of hundreds of horses and hundreds of people. Officials and merchants were received at post stations along the route, creating an impressive scene that was said to resemble the formal processions of feudal lords.
Historic Remains Along the Silver Road
Traces of People Who Traveled the Ancient Road
Various remains of the historic transportation network can still be found along sections of the Iwami Ginzan Kaido. These include stone-paved sections, earthen bridges, road markers, and traditional mileposts.
These features are more than archaeological remains. They provide a tangible connection to the people who once walked these mountain roads, carrying silver, goods, and supplies between the mine, villages, and ports.
Stone Buddhist statues and memorial monuments can also be found along parts of the route. Their presence reflects the religious practices of travelers who prayed for safe journeys, good health, and protection while crossing the difficult mountain roads.
A Historic Road Surrounded by Nature
The Iwami Ginzan Kaido passes through many mountainous areas, where the surrounding natural environment is an important part of the experience.
At Korozaka Pass, visitors can walk through broad-leaved forests and observe wild birds. Around the Nishida settlement, beautiful terraced rice fields create a traditional rural landscape.
Depending on the area and season, visitors may also encounter wildlife. The combination of historic trails, forests, mountain scenery, and traditional villages makes the Silver Road an appealing destination for travelers who want to experience both Japanese history and nature.
The Silver Road as a Corridor of Culture and Exchange
The Iwami Ginzan Kaido was not simply a transportation route. It also became a corridor through which people, goods, technology, and culture moved between different regions.
Post towns developed along the road, while commerce and financial activities grew around the movement of silver and other goods. Regional traditions were also influenced by exchanges along the route.
For example, the distinctive red Sekishu roof tiles known as Sekishu kawara became an important feature of the region. Food traditions and other cultural practices also traveled between the San’in region along the Sea of Japan and the San’yo region facing the Seto Inland Sea.
Experiencing the Iwami Ginzan Kaido Today
Today, some sections of the Iwami Ginzan Kaido have been developed as walking trails, and guided tours are available in certain areas. Walking the historic routes allows visitors to experience the terrain directly while learning about the people who once traveled these difficult paths.
Local governments and community organizations are also working together to preserve the routes, improve information signs, and introduce the history of the Silver Road to visitors.
Once an essential transportation network connecting the silver mine with ports and cities, the historic road has become a place where travelers can rediscover the landscapes and stories of the past.
Walking Through the History of Iwami Ginzan
The Iwami Ginzan Kaido is an important part of the history surrounding the Iwami Ginzan Silver Mine. Its mountain paths preserve traces of the people who transported silver, traveled for business, served as officials, or simply made their way between communities.
The remains of old roads, stone structures, religious monuments, villages, and terraced fields create a landscape in which history and nature exist side by side.
Walking along the Silver Road is more than a hike. It is a journey through the history of Japan’s silver industry and the communities that developed around it. Take your time, enjoy the mountain scenery, and imagine the travelers who once followed these same paths as you explore this remarkable historic landscape.