Noun
nagamaki (plural nagamakis or nagamaki)
A type of Japanese sword; a single-edged curving blade with a handle comparable in length to that of the blade, whose blade is length is usually comparable to other regular Japanese swords, though other longer ones also were made.
The name refers to the style of mount as well as a blade type which means that a naginata blade could be mounted in a nagamaki mount and be considered a nagamaki. Source: Internet
Unlike most Japanese weapons, there were no specific rules about exact measurements and proportions for nagamaki. Source: Internet