A Yayoi Village Beside the Toyokawa
In a quiet residential block of Toyohashi, in the far east of Aichi Prefecture, a single thatched house stands on an open patch of green. It marks the Urigō Site (Urigō iseki), the remains of a farming and fishing village that people occupied for centuries during the Yayoi period, roughly two thousand years ago.
The settlement sat on the low alluvial plain of the lower Toyokawa River, on what was then a sandbar rising just above the surrounding marsh. The ground here once lay about a meter lower than it does today, and a valley-shaped wetland some 400 to 500 meters across spread through the area. Villagers opened paddy fields in that wet ground and built their homes on slightly higher land that looked out over it. Oak, chinquapin, and chestnut woods covered the nearby rises, and because the coastline reached further inland than it does now, the sea lay only a short way down the river.
Japan designated Urigō a National Historic Site on 14 November 1953, recognizing one of the most informative wetland villages of its age in the country.
From a River Project to a National Historic Site
The site came to light in 1947, when work to reshape the channel of the Egawa, a small river running through the city, cut into ground rich with ancient material. Five seasons of excavation between 1947 and 1952 uncovered a large settlement that had grown and shifted over generations.
What made the find remarkable was its setting in waterlogged lowland. Damp, oxygen-poor soil preserves organic material that normally rots away, and Urigō yielded wooden tools and other perishable objects rarely seen at drier sites. Archaeologists came to rank it alongside the Toro Site in Shizuoka and the Karako Site in Nara as one of the most important lowland Yayoi settlements in Japan.
The layered deposits gave the site a second kind of value. Yayoi pottery of five successive styles lay stacked in clear stratigraphic order, letting researchers read the sequence of change directly from the ground. A distinctive local ware decorated with combed patterns took the name Urigō-type pottery, a label still used as a chronological marker for the period.
The 1953 designation cites the criterion for shell mounds, settlement remains, tombs, and related sites, and Toyohashi City has managed the property since 1964. Its value rests on a simple fact: a single community lived here continuously through the middle and late Yayoi, combining rice farming with fishing and hunting, and left behind a shell mound that records that mixed way of life.
What the Ground Gave Up
Excavators recorded more than eighty pits and house traces across the site. The dwellings had rounded rectangular or oval floors; one measured about 5.5 meters on its long axis and 3.6 on its short, with two postholes for the roof supports. How exactly these houses were built remains an open question. Some researchers have argued that the wet ground made it hard to dig the sunken-floor pit dwellings common elsewhere in the Yayoi period, and that people instead raised their homes at ground level. The reconstructed house now standing on the site offers one reading of the evidence rather than a settled answer.
The everyday objects tell a fuller story. Alongside the combed pottery came polished stone axes and stone reaping knives, several of a continental type, together with tools of bone and antler. Wooden hoes and spades survived in the damp soil, and so did charred grains of rice, the clearest proof that the villagers grew their own crops.
They did not live by farming alone. Small shell mounds held the bones of birds, animals, and fish, while the excavators recovered fishhooks, leisters, a wooden bow, and gathered nuts. Read together, the finds describe a community that planted paddies, fished the nearby waters, hunted the surrounding woods, and took what each season offered.
Most of these objects are now kept at the Toyohashi City Museum of Art and History. The site itself holds only the open ground and the single reconstructed dwelling, yet standing there, with the Toyokawa floodway close by, it is easy to picture the marsh and the low houses that once looked out across it.
Around the Site
Urigō sits in a residential part of Toyohashi, a short distance off the old Tōkaidō road and close to the Toyokawa floodway. The green with its reconstructed house is free to enter at any time, though there is no dedicated parking, so the easiest approach is on foot: about 15 minutes from Shimoji Station on the JR Iida Line.
To see what came out of the ground, head into central Toyohashi and the Toyohashi City Museum of Art and History, which sits inside Toyohashi Park on the grounds of the former Yoshida Castle. The museum shows pottery, stone tools, and other finds from the site among its local history collections. Its permanent galleries are free, opening hours run from 9:00 to 17:00, and it closes on Mondays and over the New Year period. From Toyohashi Station, the city streetcar reaches the Toyohashi-kōen-mae stop in a few minutes, and the museum is a short walk to the north.
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Q&A
- When can I visit the Urigō Site, and is there an entry fee?
- The site is an open green space in a residential area and can be visited freely at any time, with no admission charge. There is no parking on site, so most visitors walk the roughly 15 minutes from Shimoji Station on the JR Iida Line.
- What is there to see at the site itself?
- The main feature is a single reconstructed dwelling on an open patch of ground, with an information board nearby. The excavated material is not kept here; to see the pottery, stone tools, and wooden objects, visit the Toyohashi City Museum of Art and History.
- Why is Urigō considered such an important site?
- Its waterlogged lowland setting preserved wooden tools and other organic material that rarely survive, and its layered pottery records five successive Yayoi styles in order. Archaeologists rank it with the Toro and Karako sites as a key lowland settlement of the period.
- How did the people of Urigō live?
- They combined several ways of making a living. Charred rice grains and wooden farming tools show that they grew rice, while shell mounds, fishhooks, harpoons, a wooden bow, and gathered nuts show that fishing, hunting, and foraging were just as much a part of daily life.
- Were the houses pit dwellings?
- That is debated. The excavated houses had rounded rectangular or oval floors, and some researchers think the wet ground led people to build at ground level rather than dig the sunken pit dwellings common elsewhere in the Yayoi period. The reconstructed house on site reflects one interpretation of the remains.
Basic Information
| Name | Urigō Site (Urigō iseki) |
|---|---|
| Location | Yorimichi, Urigō-chō, Toyohashi City, Aichi Prefecture |
| Designation | National Historic Site |
| Date of designation | 14 November 1953 |
| Period | Middle to late Yayoi period, into the early Kofun period |
| Management | Toyohashi City (since 1964) |
| Excavations | Five seasons, 1947 to 1952 |
| Access | About 15 minutes on foot from Shimoji Station (JR Iida Line) |
| Admission | Free; open at all times. No on-site parking |
| Finds on display | Toyohashi City Museum of Art and History (Toyohashi Park) |
References
- National Database of Designated Cultural Properties, Agency for Cultural Affairs
- https://kunishitei.bunka.go.jp/bsys/maindetails/401/1449
- Cultural Heritage Online, National Institute of Informatics
- https://bunka.nii.ac.jp/heritages/detail/138534
- Urigō Site, Toyohashi City Museum of Art and History
- https://toyohashi-bihaku.jp/
- Urigō Site, Toyohashi Tourism and Convention Association
- https://www.honokuni.or.jp/toyohashi/spot/000068.html
- Toyohashi Archive: History of Toyohashi
- https://adeac.jp/toyohashi-city/texthtml/d100010/mp100010-100010/ht010080
Last verified: 2026.06.14