Kodachi are from the early Kamakura period (1185–1333) and are in the shape of a tachi. Kodachi are mounted in tachi style but with a length of less than 60 cm.[1] They are often confused with wakizashi, due to their length and handling techniques. However, their construction is what sets the two apart, as kodachi are a set length while wakizashi are forged to complement the wielder's height or the length of their katana.[2] As a result, the kodachi was too short to be called a sword properly but was also too long to be considered a dagger, thus it is widely considered a primary short sword, unlike the Tantō or the Wakizashi which would act as a secondary weapon that was used alongside a longer blade.