Yari (槍) is the term for one of the traditionally made Japanese blades (nihonto) in the form of a spear, or more specifically, the straight-headed spear. The martial art
of wielding the yari is called sojutsu.
Early yari are believed to have been derived from Chinese spears, these hoko yari are thought to be from the Nara period (710-794)., and while they were present in early Japan's
history, the term yari appeared for the first time in written sources in 1334 but this type of spear did not become popular until the late 1400s.