Among the most significant events of the middle Kamakura period (1185–1333) were the unsuccessful Mongol invasions of Japan in 1274 and 1281. The Japanese cavalry were confounded by the Mongols’ use of massed archery, and by the hordes of Mongol infantry armed with long spears and other polearms. One consequence of these invasions was a shift in Japanese battle tactics from cavalry to infantry, together with increased production of spears (yari) and halberds (naginata).

By the Muromachi period (1392–1573), polearms had become the principal weapon of the foot soldier (ashigaru); the naginata, which was primarily for cutting, was an efficient weapon against massed ranks of infantry and against cavalry. The blades could be up to one metre long. Naginata-style blades were also sometimes mounted on shorter handles and used in a manner akin to swords.

This piece has an excellent forged blade, and the simple mounting, with an unidentified family crest, suggests it was more of a practical weapon than a ceremonial or processional one.

Text adapted from Japan: Courts and Culture (2020)