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tachi vs katana length
Generally speaking, the tachi is longer, with a blade length of more than 80 cm, and the lengths are divided into odachi (over 150 cm) and kodachi (under 80 cm), while the blades of the uchikatana are basically between 70 and 80 cm in length, and the sori of the tachi is usually larger in comparison to the two. Generally speaking, the tachi is longer, with a blade length of more than 80 cm, and the length of the blade is differentiated between odachi (over 150 cm) and kodachi (under 80 cm), while the blade length of the uchikatana is basically between 70-80 cm, and the sori（radian） of the tachi is usually larger. of the tachi is usually larger in comparison.
The difference between Tachi and Katana
The two were used in different times and situations, with tachi being used mainly from the late Heian Period (12th century) to the early Muromachi Period, and katana being used later than tachi, from about the middle of the Muromachi Period to the end of the Edo Period. Therefore, it can be said that katana is the successor of tachi. In the Heian period, the main form of warfare was horseback fighting, and the tachi was longer, with a higher siri (curvature) and an upturned handle, so the tachi was more suitable for use on horseback. From the Muromachi period to the Edo period, the main form of warfare and combat was on the ground, and the katana had a smaller curvature, slightly less cutting ability, and was not long enough, so the katana was mainly used when a person was standing on the ground.
