The Tombs of the Lords of the Shinjō Domain are a historic burial complex preserving the mausoleums of successive members of the Tozawa family, who governed the Shinjō Domain during the Edo period (1603–1868). The mausoleums are located at Zuiunin Temple and Keigakuji Temple in Shinjō City, Yamagata Prefecture, and the entire complex is designated as a National Historic Site of Japan.
Locally, the mausoleums are affectionately known as “Otamaya,” meaning a place where the spirits of the deceased are enshrined. The structures were built during the Edo period and are characterized by their extensive use of zelkova wood. Their carefully crafted details provide an insight into the sophisticated woodworking and architectural techniques of the time.
Another notable feature is that the mausoleums contain not only domain lords but also their official wives, children, and concubines. Such an arrangement is considered unusual among burial sites of early-modern feudal lords in Japan.
The Tozawa family originally established its base around present-day Kakunodate in Semboku City, Akita Prefecture. The family is traditionally said to have settled at Kakunodate Castle in 1424, after which it gradually expanded its influence during the Sengoku period of civil warfare.
During the early Edo period, the Tozawa family moved between several territories. Under Tozawa Masamori, the family spent approximately 20 years around the Ogawa area of present-day Omitama City and the Takahagi area of Ibaraki Prefecture.
In 1622, Tozawa Masamori was granted a domain totaling 60,000 koku in parts of Mogami and Murayama districts in Dewa Province and moved to Shinjō.
From that time onward, the Tozawa family governed the Shinjō Domain for 11 generations. The surviving mausoleums are therefore an important cultural heritage site for understanding the history of the domain and the family that ruled it.
Zuiunin Temple is a temple of the Soto school of Zen Buddhism and one of the Tozawa family’s ancestral temples. The temple was completely destroyed by fire in 1701 and was subsequently relocated to its present site in 1706.
Six mausoleum structures remain within the temple grounds. They contain the remains of 10 of the 11 Shinjō lords, with the exception of the second lord, Masanobu.
The orderly arrangement of the wooden mausoleums provides a quiet and dignified landscape that conveys the history of the Shinjō Domain and the Tozawa family.
The mausoleums make extensive use of zelkova wood, a material prized in traditional Japanese architecture for its strength and beautiful grain.
The substantial wooden structures allow visitors to appreciate the craftsmanship of the Edo period while also gaining a sense of the funerary and memorial traditions associated with an influential feudal family.
Keigakuji Temple belongs to the Myoshinji branch of the Rinzai school of Zen Buddhism. It was founded in 1625 by Tozawa Masamori, the first lord of the Shinjō Domain.
The temple’s original name is said to have been associated with the posthumous Buddhist name of Masatake, Masamori’s beloved child who died at a young age. The temple was later renamed Kounzan Keigakuji.
Together with Zuiunin, Keigakuji forms an important part of the Tozawa family burial complex and provides another perspective on the history of the family and the Shinjō Domain.
The value of the Tozawa family mausoleums lies not simply in the fact that they preserve the graves of successive domain lords. The surviving structures were built over approximately 100 years, from the early to late 1700s, allowing visitors to observe changes in architectural style over time.
Each mausoleum reflects characteristics of the period in which it was constructed. Together, they provide valuable clues not only to the history of the Tozawa family but also to the development of feudal burial architecture and memorial customs during the Edo period.
At many burial sites associated with early-modern feudal lords, the lord and members of the family were sometimes buried in separate locations. The Tozawa family mausoleums are unusual because lords, their official wives, children, and concubines were enshrined within the same mausoleum complex.
This arrangement is considered particularly rare in Japan. It provides an interesting perspective on the structure of the Tozawa family and the ways in which elite families commemorated their deceased relatives during the Edo period.
The Tozawa family mausoleums preserved at Zuiunin and Keigakuji are designated as Important Cultural Properties of Japan. The entire Tozawa family burial site is also protected as a National Historic Site, recognizing its importance to the cultural history of Shinjō.
The zelkova-built mausoleums are especially valuable examples of architectural craftsmanship associated with an Edo-period feudal family. Rather than relying solely on elaborate decoration, the structures make effective use of the natural texture and dignified appearance of the wood itself.
The Tombs of the Lords of the Shinjō Domain at Zuiunin Temple preserve the history of the Tozawa family from its Sengoku-period origins through its role as rulers of the Shinjō Domain during the Edo period.
Walking among the mausoleums offers visitors an opportunity to observe how architecture changed over approximately a century and to discover the distinctive tradition of commemorating domain lords together with members of their families.
For travelers interested in the history of Shinjō, the site provides a peaceful and atmospheric way to explore the story of the Tozawa family, the Shinjō Domain, Edo-period architecture, and traditional Japanese memorial culture.