What carbon steel grades are used in these orange tachi?

Most pieces in this collection use either 1045 or 1095 carbon steel. The 1045 grade offers a balanced combination of toughness and hardness around 48-50 HRC, making it resilient and well-suited for full-tang display swords that maintain their geometry over time. The 1095 grade has a higher carbon content that allows for differential hardening, producing a visible hamon temper line along the edge — a detail prized by collectors. Both steels respond well to traditional forging techniques and hold a clean polish. To preserve the finish, a light application of choji oil every few months prevents surface oxidation.

How should I store and maintain a hamon tachi for long-term display?

Proper storage protects both the steel and the fittings. Apply a thin coat of choji oil (or a light mineral oil alternative) to the blade every two to three months, or more frequently in humid climates. Wipe the blade clean with a soft cloth before re-oiling to remove any residue or fingerprints - skin oils accelerate oxidation on high-carbon steel. Store the sword horizontally on a display stand with the edge facing upward, or in its saya (scabbard) in a low-humidity environment away from direct sunlight, which can fade lacquered saya finishes and ito wrapping over time. Avoid storing in sealed leather cases, which trap moisture. For display-only pieces, a wall-mounted rack in a climate-controlled room is ideal. Do not store the blade in its saya for months at a time without periodic inspection, as trapped humidity can cause rust along the hamon line where the steel is most reactive.

How should I store a full tang tachi long-term?

Long-term storage for a carbon or Damascus steel tachi requires attention to three factors: moisture, contact surfaces, and periodic maintenance. The blade should be lightly coated with a neutral oil - traditional choji oil or a modern equivalent - before being sheathed in the saya. Store the assembled piece horizontally or on a display stand away from direct sunlight and heat sources, both of which accelerate oxidation and can cause lacquered saya finishes to crack. Avoid storing the blade in a closed leather or fabric case for extended periods, as these materials can trap humidity against the steel. Check the blade every few months, wipe it clean with a soft cloth, and reapply oil as needed. The tsuka wrap should also be inspected periodically for loosening near the knot points.

What steel types are used in display-quality tachi blades?

Display-quality tachi in this collection are offered in three main steel types, each with distinct visual and structural characteristics. Damascus steel features layered folded patterns across the blade surface that become especially visible under directional lighting - a visually striking choice for wall display. T10 high-carbon steel, when clay-tempered, produces a genuine hamon temper line along the edge, a detail that serious collectors associate with traditional craft accuracy. 1095 high-carbon steel provides a clean, well-polished finish with reliable structural consistency, often preferred for full sets where visual uniformity across multiple pieces matters. None of these are stainless steel, so all three benefit from periodic light oiling with choji or mineral oil to maintain the blade surface during long-term display.

How should I display and store a 1045 tachi sword?

Updated Feb 2026

A horizontal wall-mounted rack is the most traditional and visually effective way to display a tachi. Position the sword with the edge facing downward and the saya resting in padded cradles near the koiguchi (scabbard mouth) and kojiri (scabbard tip) to distribute weight evenly and showcase the curvature. Avoid direct sunlight, which can fade lacquered saya and dry out wooden fittings over time. For storage, keep the blade lightly coated in choji oil and slip it into its saya. Humidity is the main concern with 1045 steel; a small silica gel packet placed near your display area helps buffer moisture in rooms without dedicated climate control.