Historic site in Abashiri, Hokkaidō, Japan
 in Abashiri, Hokkaidō, Japan, was an Ainu chashi, or a fortified settlement. Occupying an elevated site overlooking the Sea of Okhotsk, the natural changes in elevation of the two mounds upon the plateau were ideal for a fortification. The defensive capability was augmented by the addition of moats. The site is also known as . 
It is now a historical site open to the public and has been designated a national Historic Site.
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