Gaifū collectible katana by MoonSwords Guild, clay-tempered T10 steel

Collectible Katanas, Tachi, Jian & Dao: A Collector's Guide

What makes a katana collectible? How the katana, tachi, jian and dao differ, what collectors look for, and how to build a collection across Japanese and Chinese traditions.

Matsukage katana with a hand-forged, clay-tempered T10 carbon steel blade

How a Katana Is Clay Tempered, Step by Step

From forge to final polish: how a katana is clay tempered step by step, how to tell a real hamon from a fake, and how to care for a clay-tempered blade. Part 2 of our clay tempering series.

Sōō katana blade tip showing a clay-tempered Damascus steel edge

What Is Clay Tempering? Differential Hardening Explained

What really happens inside the steel when a smith clay tempers a katana: martensite vs. pearlite, the hamon, the curve, and which steels work. Part 1 of our clay tempering series.

The Metallurgy and Legacy of the Hamon

The Metallurgy and Legacy of the Hamon

In the study of Japanese metallurgy, the Hamon (刃文) is defined as the visible boundary resulting from the complex process of differential hardenin...
Close-up of a tool steel katana blade with visible polish

Tool Steel Katanas: Tradition Meets Modern Metallurgy

Modern metallurgy meets tradition with tool steel katanas. Known for their toughness, edge retention, and durability, these blades combine the artistry of the samurai sword with the performance of high-tech steel. A tool steel katana isn’t just a weapon—it’s a modern evolution of one of history’s most iconic blades.


Clay Tempering a Katana: Why Smiths Still Do It

Clay Tempering a Katana: Why Smiths Still Do It

Why katana smiths still clay temper their blades: a hard edge and tough spine in one sword, the curve, the hamon, and what it means for collectors. Start here for our clay tempering series.

History of the Katana: Samurai Craftsmanship and Legacy

History of the Katana: Samurai Craftsmanship and Legacy

The katana, one of the most revered and iconic swords in history, holds a prominent place in the legacy of Japanese culture and martial arts. Known...