How should I display and maintain a full tang Nodachi?

Because of its exceptional length, a Nodachi requires a horizontal sword stand or wall-mounted rack with at least two support points spaced far enough apart to prevent bowing. Avoid direct sunlight, which can fade lacquered saya finishes and dry out tsuka ito wrapping. For blade maintenance, apply a thin coat of choji oil or refined mineral oil every four to six weeks using a soft cotton cloth, wiping from spine toward edge in one direction. In humid climates, increase oiling frequency to prevent surface oxidation, especially on high-carbon steels like 1060 and T10. The saya interior should remain clean and dry — never store the blade inside the scabbard for extended periods in high-humidity environments, as trapped moisture accelerates corrosion.

What's the difference between a tachi and an odachi in this collection?

Both tachi and odachi are long-bladed, edge-down worn swords from Japan's classical period, but they differ in scale and historical application. A tachi typically measures between 70-80 cm in blade length and was the standard long sword of mounted samurai from the Heian through Muromachi periods. An odachi (also called nodachi) pushes beyond that - blades of 90 cm or more were produced for specific ceremonial, votive, or battlefield applications, and some examples in this collection reach over 40 inches in blade length alone. From a display perspective, the odachi commands more physical presence and pairs well with a floor stand or wall mount as a room centerpiece. Both formats in this collection share the same clay-tempering process and real hamon construction.

What makes an odachi different from a regular tachi?

An odachi - sometimes called a nodachi - is defined by its exceptional length, typically exceeding 90 cm of blade compared to the 60-75 cm range of a standard tachi. Historically, this scale was associated with ceremonial presentation, votive offering at shrines, and the display of status rather than practical daily carry. The elongated proportions place unique demands on the swordsmith: maintaining consistent geometry, hamon line, and steel integrity across a longer billet requires significantly more control during the forging and clay tempering stages. For collectors, this translates into a display piece with commanding visual presence - the kind of centerpiece that anchors an entire room arrangement rather than sitting quietly on a shelf.

How does manganese steel compare to 1095 carbon in a tachi blade?

Manganese steel and 1095 high-carbon steel each bring different metallurgical character to a forged blade. Manganese steel — sometimes referred to as Hadfield steel in industrial contexts — contains a higher manganese content that improves toughness and resistance to stress fracturing, making it particularly suited to longer blade formats like nodachi and tachi where flex under its own weight becomes a consideration during display. 1095 carbon steel, by contrast, is valued by collectors for its predictable grain structure and the clean hamon activity it produces during differential hardening. A 1095 blade polished to a fine finish will show a more defined transition line between the hardened edge and the softer spine, which is a detail many collectors specifically seek. Neither is objectively superior — the choice reflects what a collector prioritizes: structural resilience or visual grain definition.

What is an odachi?

Updated Mar 2026

An odachi — also called nodachi — is an oversized Japanese sword with a blade exceeding 90 cm, sometimes reaching over 150 cm. These large swords were used by foot soldiers against cavalry and in open-field engagements. Today odachi and nodachi are among the most visually impressive collectible swords, valued for their scale and the skill required to hand-forge such a large blade.