The site of Moshiriya Chashi (モシリヤ砦跡, Moshiriya chashi ato) in Kushiro, Hokkaidō, Japan, is once occupied by the Ainu fortified chashi of Moshiriya. Occupying an elevated site, it is said to have been constructed during the Hōreki era (1751–1764) by the Ainu chieftain Tomikara Aino (トミカラアイノ). It is one of a cluster of eleven chashi which have been jointly designated a national Historic Site:

They have a total designated area of 55,579.48 square metres (5.557948 ha).