The Nozaki Family and Their Historic Residence
The Rise of the Nozaki Family
From the late Edo period onward, the Nozaki family built its fortune through salt production and the development of new agricultural land. Buzaemon Nozaki commissioned the construction of the family residence in stages between the Tenpō era (1830–1844) and the Kaei era (1848–1854).
The extensive property covers approximately 3,000 tsubo, or about 9,900 square meters, while the total floor area of its buildings reaches approximately 1,000 tsubo, or about 3,300 square meters. The grounds contain imposing main buildings with traditional Japanese roof tiles, along with six earthen storehouses. Together, they convey the wealth and prestige of the family at the height of its prosperity.
Architectural Layout and Cultural Significance
The main residence stands at the center of the grounds, with the entrance building and front reception hall arranged in front. A grand Nagayamon gate and a formal guest gate known as the Onarimon stand at the front of the property. To the north are rows of earthen storehouses, including the inner storehouse. These buildings were constructed in stages from the late Edo period through the middle of the Meiji era (1868–1912).
The principal rooms of the main residence and the front reception hall feature traditional architectural elements such as alcoves, decorative shelves, and built-in writing alcoves. Their refined interiors reflect the high standard of craftsmanship associated with an affluent merchant household of the period.
The former residence was designated a Prefectural Historic Site by Okayama Prefecture in 1977, and the buildings were designated Important Cultural Properties of Japan in 2006. The buildings and gardens have been carefully preserved, making the property an outstanding example of the grand residences once built by powerful local landowners and merchants in the Seto Inland Sea region.
Buzaemon Nozaki and the Salt Industry
The Beginnings of Salt-Pan Development
In 1829, Buzaemon Nozaki established irihama-style salt fields in Kojima, helping transform salt production into a major local industry. This traditional method used the rise and fall of the tides to bring seawater into shallow salt fields. The water soaked into a layer of sand, and the resulting concentrated brine was collected for salt production. The method had been used since the early Edo period and remained in operation until the 1950s.
Expansion into Higashi-Nozaki Salt Fields
Buzaemon continued to expand his operations. In 1841, he developed approximately 74 hectares of salt fields in what is now the Yamada district of Tamano City. In 1863, he established a further 20 hectares in the Muneage district. These developments became known collectively as Higashi-Nozaki Hama. The expansion helped the Nozaki family achieve considerable success in the salt industry.
Salt-Production Techniques and Labor
Traditional irihama salt fields were designed so that their surfaces lay below sea level at high tide but above sea level at low tide. Sand spread across the fields absorbed seawater, which evaporated under the sun and left behind concentrated brine. Workers repeatedly turned and spread the sand to ensure even moisture distribution, a task known as hamabiki. Various techniques were used to improve evaporation and increase production efficiency.
The Transition to Modern Salt Production
From the latter half of the 1950s, Japan’s salt industry began shifting from irihama-style fields to a more efficient system known as nagashishiki, or the flowing-water method. Seawater was pumped onto sloping evaporation surfaces and then passed through structures called shijoka, which helped concentrate the brine.
Compared with the traditional method, the new system increased production to approximately three times the previous level while substantially reducing the amount of labor required. This transition marked a major change in the way salt was produced in Japan.
History and Cultural Heritage Designations
Key Dates in the History of the Residence
1829: Buzaemon Nozaki constructed irihama-style salt fields in Kojima.
1838: The Nozaki family’s Nagayamon and Onarimon gates were completed.
1852: The front reception hall was completed.
1863: The former Nozaki Hama lighthouse, known as the Tōmyōdai, was completed.
1977: The former Nozaki residence was designated a Historic Site by Okayama Prefecture.
1995: The Nozaki Family Salt Industry Museum was registered as a museum.
2006: The Former Nozaki Residence was designated an Important Cultural Property of Japan.
Buzaemon’s Social Contributions and Family Principles
Buzaemon Nozaki used part of the wealth he accumulated through salt production to support the local community. His family principles included the ideas that one should not pursue profit through new business ventures merely for personal gain and that money should not be spared when a project serves the public good.
He supported the care of abandoned children and provided assistance to people living in poverty. These charitable activities earned the family considerable respect among local residents and demonstrate that its legacy extended beyond business success.
Highlights of the Former Nozaki Residence
Nagayamon Gate
The impressive Nagayamon stands atop seven stone steps and a sturdy stone retaining wall. Measuring approximately 24 meters along its front, the gate is one of the most striking structures on the property. Rooms extending to either side resemble a row of houses and were used as living quarters, resting spaces, and simple overnight accommodation.
Earthen Storehouses
Six earthen storehouses stand in an orderly row across the grounds. Each reflects the construction techniques and decorative wall patterns of a different period. Two of the storehouses have been renovated and now serve as exhibition spaces, allowing visitors to explore the family’s history and the development of the salt industry.
Front Reception Hall Garden
The garden in front of the reception hall is a traditional karesansui, or dry landscape garden, designed as a special setting for receiving important guests. Black pines, Japanese cypress, and sago palms grow among the carefully arranged landscape features. In early summer, the azalea shrubs bloom spectacularly, adding vivid color to the garden.
Tea Rooms
The residence contains three tea rooms, each with its own character. Kanchōtei was designed as a place from which to observe the first light of dawn, while Yōshitsutei conveys a sense of formality and traditional refinement. Rinchitei faces a dry pond in the garden and offers a quiet setting for contemplation and tea.
Main Residence and Garden
The main residence was the center of the Nozaki family’s domestic life and business activities. Its nine connected rooms extend for 23 ken, approximately 42 meters, creating an impressive sequence of traditional Japanese interiors.
The garden beside the main residence is designed in the Hōrai style, incorporating a dry waterfall, moss, and unusual stones. Inspired by the legendary island of immortals in East Asian tradition, the garden symbolizes wishes for longevity and prosperity.
Buzaemon Nozaki’s Life and Family Legacy
The Life of Buzaemon Nozaki
Buzaemon Nozaki (1789–1864) was an entrepreneur of the late Edo period who played a major role in expanding the salt industry in Kojima, Okayama. He was born in Ajino Village, Kojima District, Bizen Province, in what is now Kojima, Kurashiki City. Seeking to restore and strengthen his family fortunes, he devoted himself to developing salt fields and building a successful business.
The Next Generation
After the death of the first Buzaemon, his grandson Buzaemon Nozaki (1848–1925) inherited the family business and became an influential figure in Japan’s salt industry. He also engaged in public service and served as a member of the House of Peers, contributing to society in a variety of roles.
Related Sites and the Legacy of Salt Production
Today, the Former Nozaki Residence is open to the public as one of Kojima’s principal tourist attractions. Its extensive grounds and exhibition spaces offer insight into the family’s history, traditional architecture, and the development of salt production in the region.
The former Nozaki Hama salt fields were redeveloped into a new urban district in connection with the opening of the Seto Ohashi Bridge. Meanwhile, the former salt-field site in the Muneage district of Tamano City is home to the headquarters factory of Naikai Salt Industry, which continues to operate today. These locations help illustrate how the area’s historic salt industry has evolved into the modern era.