Katana Blog

From Kuina's promise to Oden's legacy — every named blade Zoro has carried in One Piece, the sword grading system, the Kitetsu curse, and how these anime katanas connect to real swordsmithing.

From Tanjiro's mysterious black blade to the ultimate red Nichirin, here's every sword color in Demon Slayer — what it means, who wields it, and how it connects to real Japanese swordsmithing.

From Musashi's 60 undefeated duels to the missing Honjo Masamune, the cursed blades of Muramasa, and the demon-slaying Dōjigiri — the warriors and swords that made history.

An $800 "hand-forged" katana turned out to be a $40 stainless steel fake. Here are the 8 checks that would have caught it — tang, hamon, steel, fittings, weight, price, listing, and seller.

Clay tempering isn't marketing — it's a 1,000-year-old process that gives a blade two hardness zones, a real hamon, and a natural curve. This guide explains what it means, how to verify it's real, and whether the price premium is justified.

The Damascus pattern is stunning. But does it cut better? This guide separates ancient Wootz from modern pattern-welding, real from fake, art from hype — so you know exactly what you're paying for.

Kill Bill says yes. Physics says it depends. This guide uses real hardness data, historical tameshigiri records, and expert analysis to separate katana cutting myth from reality.

The katana starts out straight. The curve happens in five seconds during quenching — martensite expansion at the edge, pearlite at the spine. This guide explains the science, the advantages, and the myths.

Samurai katana vs European longsword — two civilizations, two blades, one question. This guide compares cutting power, thrusting, armor penetration, martial arts systems, and delivers an honest verdict.