How should I store and maintain a purple saya katana long term?

For long-term display and storage, keep the sword horizontal on a dedicated katana stand or mount it on a wall rack where the saya is not under sustained contact pressure from a single edge - this prevents lacquer compression marks over time. Avoid direct sunlight on the saya; UV exposure gradually shifts lacquer pigment, and purple tones are particularly susceptible to fading or color drift over months of light exposure. Humidity is the more serious concern: store in a space with relatively stable, moderate humidity. Excessive moisture can cause the hardwood saya core to swell, which affects how the blade sits within the scabbard and can stress the lacquer surface. Before storing the blade for any extended period, apply a very light coat of choji oil to the steel using a soft cloth, then wipe off the excess - this prevents surface oxidation without transferring oil to the interior saya lining.

What makes tachi swords different from katana?

The tachi is historically older than the katana and was designed for use by mounted warriors. Its blade is generally longer, averaging 27 to 31 inches, and carries a more pronounced curvature through the body of the blade rather than concentrated near the handle. Crucially, the tachi was worn suspended edge-down from the hip using a specific suspension system called an ashi, whereas the katana is thrust through the obi edge-up. This difference in carry method influenced every proportional decision in the tachi's design. On a display piece, the distinction is visible in the deeper curve and the positioning of the signature — traditional smiths signed the tang on the side that faced outward when worn, so the signature side tells you the blade's intended orientation.

How does a tachi differ from a katana in a collection context?

Updated Feb 2026

The tachi is an older sword form predating the katana by several centuries, characterized by a more pronounced curvature and a blade length typically exceeding 70 cm. Historically, tachi were worn suspended edge-downward from the belt — the opposite of the katana's edge-upward carry. In a display collection, this distinction matters both aesthetically and historically: a tachi mounted on a stand with the edge facing down reflects correct period presentation and signals a collector's knowledge of Japanese sword taxonomy. Odachi (great swords) are an extended variant of the tachi form, sometimes exceeding 90 cm, and represent some of the most visually dramatic pieces available to collectors. Pairing a tachi or odachi alongside a standard-length katana illustrates the evolution of Japanese blade design across distinct historical periods.