Shioya, a district of Gobo City in Wakayama Prefecture, has been closely associated with salt making for more than 1,500 years. The name “Shioya” itself means “salt shop” or “place associated with salt”, reflecting the area’s long relationship with the sea and salt production.
From the Asuka period (592–710) through the Nara period (710–794), salt produced in Shioya is believed to have been valued as a product supplied to the imperial court. This long history makes Shioya one of the fascinating places in Japan for discovering the traditional culture of salt making.
In ancient Japan, salt production was a specialized technology controlled by certain clans. One of the families associated with this tradition was the Yatabe clan, said to have been descended from Yatabe no Tsurame, a consort of Emperor Nintoku. The Yatabe clan is believed to have overseen salt production across a broad area stretching from Wakasa Province to Kii and Harima.
According to tradition, members of the clan eventually settled in the Shioya area and began producing salt there. Archaeological and historical evidence provides important clues about this ancient industry.
One important piece of evidence comes from wooden tablets excavated from the site of Fujiwara-kyo, the ancient capital of Japan during the Asuka period. These tablets contain records indicating that salt from Shioya was supplied to the imperial court.
Archaeologists have also discovered salt-making pottery dating from the Yayoi period. These finds suggest that people along the coast of what is now Gobo were already engaged in salt production many centuries ago.
Further historical records show the importance of salt in the region. A wooden tablet dating to 761 records a person from Takarabe District in Hidaka County paying a tribute of approximately three to, an ancient Japanese unit of volume, of salt.
Such archaeological and historical evidence reveals that salt was not simply a household seasoning. It was an important commodity that supported the economy and daily life of ancient communities.
Today, the tradition of salt making continues in Shioya through a product known as “Shioya no Amashio.” This traditional salt is made exclusively from seawater from the Kii Channel, taking advantage of the natural environment of the Wakayama coast.
The surrounding waters are influenced by a branch of the Kuroshio Current, while the clear waters of the Hidaka River flow into the same coastal area. The interaction of these natural water sources contributes to seawater rich in minerals, providing an ideal foundation for traditional salt making.
Producing Shioya no Amashio requires considerable time and effort. Seawater is first collected and then slowly heated in large cauldrons using firewood as the only fuel.
Unlike modern industrial salt production, the traditional process does not rely on fossil fuels. The seawater is carefully concentrated through prolonged heating, after which the salt is finished through sun-drying.
Almost every stage of the process is carried out by hand. This labor-intensive approach preserves a traditional method that has been closely connected with the area’s history.
The resulting natural sea salt has a mild, rounded saltiness and deep umami flavor. No additives are used, allowing the salt to enhance the natural flavors of other ingredients without overpowering them.
Its character can be especially appreciated in simple Japanese foods. A small amount sprinkled over an onigiri rice ball, grilled fish, or lightly pickled vegetables allows the delicate flavor of the salt to stand out.
Today, the traditional salt-making process is carried out by Nanohana Workshop, a local employment support facility for people with disabilities.
Users of the facility and staff members work together to preserve the region’s traditional salt-making culture and pass it on to future generations. From splitting firewood and heating the seawater to sun-drying the salt, most of the production process is completed by hand.
The considerable amount of time and care required for this work contributes to the gentle character of Shioya no Amashio. It is therefore much more than a local food product. Each package represents the history of the community, the natural environment of the coast, and the efforts of the people who continue the tradition.
Shioya is also an important historical area along the Kumano Kodo Kii Route, one of Japan’s ancient pilgrimage routes.
The Shioya Oji site, now associated with Shioya Oji Shrine, is a designated National Historic Site and was once an important stopping point for pilgrims traveling toward the sacred sites of Kumano. Oji were subsidiary shrines located along the pilgrimage routes, where travelers could pray and rest during their journey.
In the past, the Kumano Kodo passed near the area around Oji Bridge before following the sandbar toward the settlement of Shioya. Located near the mouth of the Hidaka River, Shioya developed through its close relationship with both maritime transportation and salt production.
Ships once traveled frequently through the Kii Channel, and Shioya became a community closely connected with maritime trade. Historical landscape illustrations from the late Edo period depict people producing salt and a settlement along the coast, providing a vivid impression of the area’s former way of life.
Today, visitors can climb the stone steps leading to Shioya Oji Shrine. The quiet shrine stands on a coastal terrace surrounded by greenery, offering a peaceful atmosphere in which to reflect on the history of the Kumano Kodo.
The combination of the ancient pilgrimage route, coastal landscape, and history of salt production makes Shioya a particularly interesting destination for travelers who want to explore the deeper cultural history of Wakayama.
Salt production along the coast of present-day Gobo is believed to have been established by at least the late Yayoi period. Over the centuries, salt became an important local product and played a role in the economic development of the region.
The historical records and archaeological discoveries found in and around Gobo show that salt was transported and supplied beyond the immediate coastal community. Its value extended to political centers such as the ancient imperial court.
For this reason, the history of Shioya’s salt is closely connected with the broader history of Gobo. The production of salt was not simply a traditional craft—it was an industry that linked the sea, local communities, trade, and ancient Japanese society.
For modern travelers, salt may seem like an ordinary ingredient found in every kitchen. In Shioya, however, even a small grain of salt carries a remarkable story.
Shioya no Amashio brings together the natural resources of the Kii Channel, traditional production techniques, and the dedication of the local community. Its gentle flavor reflects not only the quality of the seawater but also the care taken at every stage of production.
A visit to Shioya can also be combined with sightseeing along the Kumano Kodo, a visit to Shioya Oji Shrine, and exploration of Gobo’s historic districts. By seeing the landscape where the salt was produced and learning about the people who continue the tradition today, visitors can gain a deeper appreciation for Gobo’s relationship with the sea.
When visiting Gobo, take some time to explore Shioya and discover the 1,500-year story of its salt-making culture. It is a small but fascinating part of Wakayama’s history, where ancient traditions, beautiful coastal scenery, and the lives of local people remain closely connected.