The Niizawa Senzuka Kofun Group is one of Japan’s most significant clusters of ancient burial mounds, located in the Kitakoshi-cho and Kawanishi-cho areas of Kashihara City, Nara Prefecture. The site is designated a National Historic Site, and artifacts excavated from Kofun No. 126 have been designated Important Cultural Properties of Japan, reflecting the group’s considerable historical and archaeological importance.
The burial mounds spread across the Ochioka Hills, which rise to approximately 150 meters above sea level south of Mount Unebi in the southern part of the Nara Basin. The archaeological area extends approximately two kilometers from east to west and two kilometers from north to south.
More than 600 burial mounds are scattered throughout the hills, most of them circular tombs measuring around 10 to 15 meters in diameter. The number and concentration of tombs make this an exceptionally large burial complex by Japanese standards.
Construction began in the late fourth century and continued through the seventh century, with particularly active periods from the mid-fifth century to the end of the sixth century. The group was formerly known as Kawanishi Senzuka or Toriya Senzuka.
The identities of those buried here and the precise historical circumstances behind the construction of the tombs remain unclear. However, powerful local rulers and influential clans are believed to have played a role in their creation.
The first archaeological excavation took place in 1947, followed by a more extensive investigation in 1962. One particularly notable discovery was Kofun No. 500, a keyhole-shaped burial mound. Excavations revealed an internal burial chamber constructed using a clay enclosure, as well as a rare suspended mirror.
During the 1960s, researchers, including teams led by Doshisha University, investigated approximately 130 burial mounds. These excavations uncovered numerous valuable objects, including weapons, horse equipment, and decorative ornaments, offering important insights into the material culture of ancient Japan.
Kofun No. 126 is particularly important for the large collection of ornaments made from gold, silver, glass, and jade discovered within it. Among the finds were a hi-no-shi, a traditional metal implement used to smooth fabric, which was the first of its kind discovered in Japan, and glass objects believed to have originated in the Roman Empire.
In 2014, research conducted by Tokyo University of Science used chemical composition analysis to confirm the Roman origin of the glass vessel. This discovery attracted considerable attention as an important new finding in the study of ancient Japanese history, providing evidence of long-distance cultural connections.
The artifacts excavated from Kofun No. 126 are held by the Tokyo National Museum and were designated Important Cultural Properties of Japan in 1979. These burial goods are highly valued as evidence of cultural exchange and technological development in ancient Japan, revealing connections that extended far beyond the Japanese archipelago.
Today, the Niizawa Senzuka Kofun Group has been developed into a park where visitors can explore the landscape surrounding the ancient burial mounds while enjoying the area’s natural environment.
The Niizawa Senzuka Kofun Group Park development project began in 2012. The park is divided into a northern section, known as the North Group Park, and a southern section, known as the South Group Park. Walking paths, observation platforms, biotopes, and a café have been developed to help visitors appreciate both the archaeological heritage and the surrounding nature.
The surrounding area also offers opportunities to learn more about local history and archaeology. The Kashihara City Museum of History and Folklore provides a place to explore the region’s past, complementing a visit to the burial mound complex.
Facilities within the park include Niizawa Senzuka Fureai-no-Sato and OTENKI Terrace. These spaces allow visitors to experience the area’s natural surroundings and local culture, making the park more than an archaeological destination.
The Niizawa Senzuka Kofun Group is approximately a 20-minute walk from Unebigoryomae Station on the Kintetsu Kashihara Line. The site can also be reached by car.
The landscape changes with the seasons, adding another dimension to a visit. In spring, cherry blossoms bring color to the park and attract visitors who come to enjoy the combination of ancient history and natural beauty.
The Niizawa Senzuka Kofun Group is an important site for understanding Japan’s ancient past. Its hundreds of burial mounds, remarkable archaeological discoveries, and tranquil park setting offer a fascinating glimpse into the lives, beliefs, and international connections of the people who lived here more than a thousand years ago.