How is an expandable spear ninja sword constructed?

An expandable spear ninja sword is a ninjato blade mounted on a telescoping pole handle that can be extended from a compact configuration to a significantly longer reach. The construction begins with a full-tang high-carbon steel ninjato blade - 1045 carbon steel is the typical grade - with the standard blade forging, heat treatment, and grinding process. The handle is built around a telescoping mechanism rather than a conventional solid handle, allowing the pole to extend from a compact storage length to a display or use length that is several times longer. When collapsed, the piece is approximately the dimensions of a standard ninjato. When extended, the overall length increases dramatically. The telescoping mechanism is mechanical - not requiring any tools to deploy or collapse - and the blade assembly is secured to the handle end in the extended position. For collectors and practitioners who want a piece that operates in two distinct configurations, the expandable spear sword offers a genuinely unusual and visually interesting alternative to any conventional sword format.

What type of steel is used in these gold ninjato swords?

Most pieces in this collection are forged from 1045 carbon steel, a medium-carbon alloy widely respected in the sword-collecting community for its balance of hardness, flexibility, and ease of maintenance. It holds an edge well while remaining forgiving enough to resist chipping under normal handling. A few select models upgrade to Damascus steel, which consists of multiple layers of different steel types folded and forge-welded together to produce the distinctive wavy grain pattern visible on the blade surface. Both steel types receive a full-tang construction, meaning the steel extends uninterrupted through the handle, providing structural integrity suited for long-term display and occasional handling.

What steel types are used in your Green Ninjato swords?

Our Green Ninjato collection primarily features two carbon steels: 1045 and T10. The 1045 grade contains roughly 0.45 percent carbon, which produces a tough, resilient blade with a clean dark finish that pairs well with green fittings. T10 steel adds a small percentage of tungsten to a high-carbon base, increasing wear resistance and — more importantly for collectors — enabling differential clay hardening. That process creates a visible hamon temper line along the blade, meaning each T10 ninjato carries a unique wave pattern that no two pieces share. Both steels are well suited to display pieces because they hold an attractive surface finish over time when properly oiled.

What steel is the ninjato blade made from?

The blade is forged from manganese steel with a full-tang construction and hand-finished to a chrome polish. It features a straight profile with a chisel tip, worked by hand for edge refinement and surface finish.

How is the purple finish applied to a ninjato blade?

Updated Feb 2026

The purple finish on a ninjato blade is applied as a surface treatment to the steel after the blade's core construction - forging, grinding, and heat treatment - is fully complete. This means the underlying blade steel and its hardness properties are established before the color treatment is applied, and the purple finish does not affect the blade's construction quality or structural integrity. Purple blade colorings can be produced through heat-based oxidation, where the blade is brought to a specific temperature that causes oxide compounds to form on the steel surface in the purple color range, or through chemical coating processes that apply a stable colored layer to the polished blade surface. The color treatment is stable for display purposes when properly cared for: avoiding abrasion and harsh chemicals, and handling with a soft cloth rather than bare hands. With proper care, the purple finish will maintain its color and vibrancy for many years of display use. Oil maintenance for the underlying steel is the same routine as for any high-carbon steel blade.