Takayama-sha Site is a nationally designated historic site in Takayama, Fujioka City, Gunma Prefecture, and one of the component sites of the UNESCO World Cultural Heritage property “Tomioka Silk Mill and Related Sites”.
The site was the birthplace of Takayama Chogoro (1830–1886), founder of Takayama-sha, an organization dedicated to improving sericulture. Here, he developed and established an innovative silkworm-rearing method known as Seion-iku, while also working to spread the technique and train the next generation of sericulture specialists.
On June 25, 2014, at the 38th session of the UNESCO World Heritage Committee, “Tomioka Silk Mill and Related Sites” was inscribed as a World Cultural Heritage property.
The property represents the development of Japan’s silk industry, which played an important role in the country’s modernization. Its component sites include Tomioka Silk Mill in Tomioka, Tajima Yahei Sericulture Farm in Isesaki, Arafune Cold Storage in Shimonita, and Takayama-sha Site in Fujioka.
Takayama-sha was recognized not simply because it improved sericulture techniques, but because it systematized those techniques and established an educational system for spreading them throughout Japan. In this respect, the site played an important role in the history of modern Japanese industry as a center of both technological innovation and education.
Takayama Chogoro began working seriously in sericulture in 1855. After years of experimentation, he achieved success in silkworm cultivation in 1861 and continued searching for methods that could produce high-quality cocoons more reliably.
At the time, one of the leading techniques was Seiryo-iku, developed by Tajima Yahei. This method emphasized ventilation by installing a raised structure, or yagura, on the roof of the silkworm-rearing building. In colder regions, another method known as Ondan-iku used heat to warm the interior.
Takayama Chogoro incorporated the advantages of both approaches and developed Seion-iku, a method that adjusted ventilation and heating according to outdoor conditions.
This balanced approach later developed into a standard sericulture technique during the middle of the Meiji period and became an important foundation for Japan’s silk industry.
In 1873, Takayama Chogoro established the Yosan Kaizen Takayama-gumi and began teaching members at his home. In 1884, the organization was renamed Yosan Kaizen Takayama-sha, with Chogoro serving as its first president.
As his reputation grew, people from across Japan came to learn his techniques. In 1887, the organization’s headquarters were moved to Fujioka Town, while the former family residence continued to serve as a branch school and training center for aspiring sericulture specialists.
In 1901, the Private Takayama-sha Sericulture School was established. Branch schools subsequently expanded throughout Japan. By 1905, there were 68 schools, and students came not only from Japan but also from China, the Korean Peninsula, and Taiwan.
Takayama-sha also actively dispatched instructors to different regions. At its height, it became so influential that it was referred to as the “headquarters of sericulture in Japan.”
The surviving main house and silkworm-rearing room is a two-story building with three roof openings known as kinuki, yagura, or raised roof vents. These structures were designed to promote efficient ventilation and were essential for controlling temperature and airflow under the Seion-iku method.
Boxes beneath the second-floor wooden floor were used to hold charcoal braziers, allowing the temperature to be adjusted carefully. The area beneath the rearing shelves was also designed to allow air to flow between the first and second floors. Openings could be adjusted to control the amount of ventilation.
The Nagayamon, or long gatehouse, is believed to date from the late Edo period. Its roof is thought to have originally been covered with wooden shingles.
Rooms once used by gatekeepers remain inside the structure, including an earthen-floor area and small rooms. Today, the building serves as an exhibition space displaying materials such as prayer plaques, sericulture diaries, and documents related to the former branch school.
Behind the main house is a building known as the Takiya, which contained a kitchen, firewood storage area, and bath.
Maintaining a clean environment was important in sericulture, making these facilities an essential part of daily life at the site.
The mulberry leaf storage house, surrounded by stone walls, was used to store mulberry leaves, the primary food source for silkworms.
The interior was divided by partition walls, and access was provided by ladders. The structure offers valuable insight into the practical aspects of traditional sericulture management.
An outdoor toilet with three plaster-covered walls and one wall finished with wooden siding also survives on the site.
Graffiti believed to have been written by students can still be seen inside. It has been preserved as a small but fascinating record of everyday life at the former school and training center.
Takayama-sha Site is owned by Fujioka City and currently has interpreters on site to explain its history and significance. Visitors can enter the historic buildings, which is one of the site’s distinctive attractions among the component sites of the World Heritage property.
Through the explanations provided by the interpreters, visitors can learn in detail about the principles of traditional sericulture, the Seion-iku method, and the historical background behind the development of Japan’s silk industry.
The nearest railway station is Gunma-Fujioka Station on the JR Hachiko Line, followed by a bus journey of approximately 30 minutes. By car, the nearest expressway interchange is the Fujioka Interchange on the Joshin-Etsu Expressway.
Following the recommendation for World Heritage inscription, visitor numbers increased significantly, with large numbers of tourists visiting during the Golden Week holiday period. Today, visitors from both Japan and overseas continue to come here to learn about the development of modern Japanese industry.
Takayama-sha Site is more than a collection of historic buildings. It was a center of knowledge where new technology was developed, taught, and disseminated, helping to support the growth of Japan’s silk industry.
The Seion-iku technique and the educational system established to spread it throughout Japan became important forces behind the development of the country’s sericulture and silk industries.
Walking among the quiet historic buildings in this mountain settlement offers a glimpse into the passion of the people who sought to create a new future during the rapidly changing Meiji era.
With both its World Heritage significance and its connection to Japan’s industrial modernization, Takayama-sha Site remains a fascinating destination for travelers wishing to explore the history, technology, and people behind Japan’s silk industry.