Overview
is the term for a traditionally-made Japanese blade (日本刀; nihontō) in the form of a spear, or more specifically, the straight-headed spear. The martial art of wielding the is called .
History
The forerunner of the is thought to be a derived from a Chinese spear. These are thought to be from the Nara period (710–794).
The term appeared for the first time in written sources in 1334, but this type of spear did not become popular until the late 15th century. The original warfare of the was not a thing for commoners; it was a ritualized combat usually between two warriors who would challenge each other via horseback archery. In the late Heian period, battles on foot began to increase and , a polearm, became a main weapon along with a yumi (longbow).
From Wikipedia (CC BY-SA 4.0).