Acronyms that contain the term chashi 

Chashi

Chashi (チャシ also 砦) is the Japanese term for the hilltop fortifications of the Ainu. The word is of Ainu origin, from チャシ (casi, /t͡ɕasi/), which means palisade or palisaded compound; a rival theory relates this to the Korean term 잣 (cas, jat, /t͡ɕa̠t̚/) of roughly the same meaning. Over 520 chashi have been identified in Hokkaidō, mostly in the eastern regions of the island; others are known from southern Sakhalin and the Kurils; similar phenomena such as the ostrogu of Kamchatka and the gorodische of northeast Asia may have developed independently. A few, including the Tōya casi of present-day Kushiro, date to the Muromachi period; the remainder date largely to the early seventeenth century. As such their construction may be related to increased competition for resources as a result of "intensification of trade" with the Japanese.

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