Yari - ninja weapon Low-poly 3D model

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Early yari are believed to have been derived from Chinese spears. These hoko yari are thought to be from the Nara period (710–794).[4][5] While they were present in early Japan's history, the term yari appeared for the first time in written sources in 1334 and this type of spear did not become popular until the late 15th century.[6] The original warfare of the bushi was not a thing for commoners; it was a ritualized combat usually between two warriors who would challenge each other via horseback archery.[7] However, the attempted Mongol invasions of Japan in 1274 and 1281 changed Japanese weaponry and warfare. The Mongols employed Chinese and Korean footmen wielding long pikes and fought in tight formations.