Omori Town, located in Oda City, Shimane Prefecture, is the historic heart of the Iwami Ginzan Silver Mine and its Cultural Landscape, a UNESCO World Heritage Site. Nestled quietly in a mountain valley, the town once flourished as one of Japan’s leading silver-producing areas. As the silver mine grew, Omori became home to miners, samurai, merchants, craftspeople, and religious communities, developing into an important center of commerce, administration, and culture.
Today, walking through Omori feels like stepping back into historic Japan. Traditional merchant houses, samurai residences, temples, and shrines line the streets, while reddish Sekishu roof tiles, stone walls, narrow lanes, and the gentle sound of the Ginzan River create a distinctive atmosphere.
Iwami Ginzan was inscribed as a UNESCO World Cultural Heritage Site in 2007. Yet the greatest charm of Omori Town is not simply its preserved historical scenery. It remains a living community where residents continue their everyday lives while protecting the town’s heritage and creating new forms of culture.
Iwami Ginzan is believed to have been discovered around the 14th century. From the 16th century onward, it developed into one of Japan’s most important silver mines. Silver produced here was exported overseas, and the mine is believed to have played a significant role in international trade and the wider economy of its time.
Control of Iwami Ginzan became a source of intense competition among powerful warlords, including the Ouchi, Amago, and Mori clans. After the establishment of the Tokugawa shogunate, the mine came under direct shogunal control as a tenryo. The shogunate established a magistrate’s office in Omori to administer the mine and its surrounding territory.
Samurai, merchants, and craftspeople gathered around the magistrate’s office, and Omori developed into the administrative and commercial center of the Iwami Ginzan territory. At the height of the mine’s prosperity, a large population is believed to have lived in and around the area.
One of Omori’s most distinctive features is its unusual urban layout within a narrow mountain valley. In many parts of Edo-period Japan, samurai, townspeople, and craftspeople lived in separate areas. In Omori, however, the rapid growth of the mining industry resulted in samurai residences, merchant houses, row houses, temples, and shrines being built close together.
Much of the town was destroyed by the Kansei Great Fire of 1800, but the townscape was subsequently rebuilt and passed down to the present day. Many buildings remaining today date from the late Edo period through the Meiji period, preserving the character of this historic mining community.
The Iwami Ginzan archaeological site was designated a National Historic Site in 1969. In 1987, the historic townscape of Omori was selected as an Important Preservation District for Groups of Traditional Buildings. Then, in 2007, the entire site was inscribed on the UNESCO World Heritage List as the Iwami Ginzan Silver Mine and its Cultural Landscape.
Since its World Heritage designation, considerable effort has been made to preserve Omori’s historic appearance. Even newer buildings are designed to harmonize with the traditional townscape, allowing visitors to enjoy the atmosphere of historic Japan at a leisurely pace.
One of the most recognizable features of Omori is its distinctive red Sekishu roof tiles. These tiles are made from clay rich in iron, a characteristic material of the Iwami region. They are known for their strength and durability and give the townscape a warm, distinctive appearance.
From hillsides and elevated viewpoints, visitors can see rows of red-tiled roofs stretching through the narrow valley. In contrast, gray roof tiles were traditionally used for samurai residences and administrative buildings, reflecting differences in status and architectural formality during the Edo period.
Green tuff, a volcanic rock formed through ancient volcanic activity, is widely used throughout Omori. Stone walls built from this material contribute to the town’s distinctive appearance, with carefully arranged stones giving the streets a sense of strength and age.
Remains of former stone quarries can also be found around the town, providing another reminder of Omori’s history as a mining community.
Plum trees are another characteristic feature of Omori. Their presence is connected not only with the town’s scenery but also with the daily lives of the miners who once worked underground.
Miners are said to have used pickled plums, known as umeboshi, as a way of dealing with dust in the mine. Some traditions say that miners kept umeboshi in their mouths or placed them inside masks, believing that the sour taste helped them remain alert while working underground.
Today, plum trees remain scattered throughout Omori as a reminder of this mining heritage. In spring, their blossoms add another beautiful seasonal touch to the historic streets.
Ryugenji Mabu is one of the largest mine tunnels at Iwami Ginzan that is open to the public. Developed during the middle of the Edo period, the tunnel still preserves marks left by miners’ chisels, offering a vivid impression of the difficult work carried out underground.
The tunnel remains cool throughout the year, providing a refreshing escape during the summer. Walking through it offers visitors an opportunity to imagine the challenging conditions in which the miners once worked.
The Omori Magistrate’s Office was established by the Tokugawa shogunate to administer Iwami Ginzan. Today, the site is home to the Imo Daikan Museum, also known as the Iwami Ginzan Museum, where historical documents, mining tools, and other materials related to the silver mine are displayed.
Among the exhibits is a remarkably old mask associated with miners, offering an intriguing glimpse into the working environment of the historic mine.
The Kumagai Residence is the grand former home of a wealthy merchant family that prospered through the mining and sake-brewing industries. Designated an Important Cultural Property of Japan, the residence features impressive plaster construction and provides an insight into the lifestyle and culture of affluent merchants during the Edo period.
Visitors can explore the historic rooms and learn about everyday life in a merchant household. Seasonal events are also held at the residence.
The Former Kawashima Residence was the home of a samurai who served as an official associated with Iwami Ginzan. Its carefully maintained garden creates a peaceful setting where visitors can experience a quieter side of historic Omori.
Listening to the sound of the Ginzan River and birdsong while looking out over the garden is one of the simple pleasures of exploring this historic town.
The Five Hundred Rakan at Rakanji Temple were created to pray for the safety of miners and to commemorate those who lost their lives at the silver mine. Numerous stone statues stand quietly within the temple grounds, creating an impressive and deeply contemplative scene.
Located on slightly higher ground, Kanzeonji Temple offers a panoramic view of Omori’s red-tiled roofs. The viewpoint has also been featured on television and is a popular place for photographing the historic townscape.
Kigami Shrine, located near the entrance to Omori, enshrines Okuninushi-no-Mikoto, a deity associated with forming and strengthening meaningful relationships. The shrine is particularly famous for its ceiling painting known as the “Singing Dragon.”
When visitors clap their hands beneath the painting, the sound reverberates through the hall and creates an echo said to resemble the cry of a dragon. It is one of the most memorable cultural experiences in Omori.
Omori has embraced a variety of new uses for its traditional buildings. Many old houses have been carefully renovated into cafés, shops, and cultural spaces while retaining their historic character.
One well-known example is Gungendo, which focuses on the themes of clothing, food, and everyday life. Visitors can browse locally inspired products and enjoy dishes prepared with regional ingredients while relaxing in a traditional setting.
At Bäckerei Konditorei Hidaka, visitors can enjoy authentic German-style bread and sweets. The bakery has attracted enthusiasts from outside the region as well as local customers.
Walking through Omori reveals old-fashioned shops, a post office, a bank, and other businesses that have been incorporated into the historic townscape.
Riyokan Arata is particularly popular for its nostalgic atmosphere. This traditional barbershop retains the character of the Taisho and early Showa periods, allowing visitors to experience a glimpse of everyday life from another era.
The round red postbox at Iwami Ginzan Omori Post Office is another favorite photography spot for visitors exploring the town.
Omori is not simply preserving its past. In recent years, the town has also welcomed new cultural initiatives, including Opera House Omoriza, sometimes described as “the world’s smallest opera house.” Created through the reuse of an old building, the venue hosts concerts and cultural events.
This combination of heritage preservation and contemporary creativity is one of the qualities that makes Omori a living historic town rather than simply an open-air museum.
The appeal of Omori extends beyond its historic buildings. The experience of walking through the peaceful mountain landscape, listening to the river, and watching the scenery change with the seasons is an important part of the journey.
Hiking is possible on Mount Sennoyama and Mount Yojayama, where elevated viewpoints offer expansive views toward Mount Sanbe and the Sea of Japan.
Visitors can also use rental bicycles or join local guided tours to discover more about the history, culture, and landscapes of Iwami Ginzan.
Omori Town is much more than a historic district within a UNESCO World Heritage Site. It is a place where Japan’s mining history, traditional architecture, religious culture, and the everyday lives of its people remain closely connected.
Red Sekishu roof tiles, historic temples and shrines, the quiet Ginzan River, traditional houses transformed into cafés and shops, and the warmth of the local community all contribute to the town’s unique atmosphere. Omori preserves a slower rhythm of life that can be difficult to find in modern cities.
Whether you are interested in Japanese history, traditional architecture, mining culture, or simply wish to enjoy a peaceful walk through an old Japanese town, Omori offers a rewarding experience. When visiting Iwami Ginzan, take time to explore the streets at a leisurely pace and discover the layers of history and everyday life that make this World Heritage town so special.