The Nanbu-Date Border Mounds (南部領伊達領境塚, Nanburyō-Dateryō Sakaizuka) are a series of earth mounds constructed in the early Edo period to mark the border between the feudal domains of Morioka Domain (i.e. “Nanbu territory”) and Sendai Domain (i.e. i.e. “Date territory”) in Mutsu Province of northern Japan. Such boundary markers were common under the Tokugawa shogunate which ruled from 1602 to 1865; however, the number of markers and their excellent state of preservation led the grouping in the modern municipalities of Kitakami and Kanegasaki in Iwate Prefecture to be designated a National Historic Site.^[1] on January 31, 2000.

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Nanbu-Date Border Mounds

南部領伊達領境塚
Nanbu-Date Border Mounds Show map of Iwate Prefecture Nanbu-Date border mounds (Japan) Show map of Japan
Location	Kitakami and Kanegasaki, Iwate, Japan
Region	Tōhoku region
Coordinates	39°15′53″N 141°03′03″E
Type	boundary markers
History
Founded	1642, 1688
Periods	Edo period
Site notes
Public access	Yes (open-air museum)
National Historic Site of Japan

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In the year 1642, the Tokugawa shogunate re-confirmed the Nanbu clan and the Date clan in their holdings, and drew a 130 kilometres (81 mi) boundary between the two feudal domains from Mount Komagatake in the Ōu Mountains in the west to the Pacific Ocean in the east. The boundary was defined physically by having a series of large earth mounds erected as boundary markers. In 1688, an additional series of smaller mounds was built to further delineate the boundary. In the 11 kilometer stretch currently designated as a National Historic Site, 17 large mounds and 198 small mounds are preserved.

The protected area is currently maintained as part of the “Michinoku Folk Village” open-air museum and is a two minute walk from JR East Kitakami Station.

• List of Historic Sites of Japan (Iwate)