The ultimate test: Samurai tested Japanese swords on human bodies.

To many, the katana is seen simply as a highly efficient weapon. But to the samurai, it was their living soul.

Because their survival depended on the steel they carried, they demanded absolute perfection—and to prove a blade was flawless, they subjected it to the ultimate test: Tameshigiri (ritual body testing).

In this video, we dive deep into the dark and fascinating history of "Saidanmei" (cutting inscriptions).

Discover the grim reality of how master testers used human bodies to rate swords, the creation of the world's first weapon rating system by the Yamada Asaemon clan, and the deep spiritual connection between the samurai, Seppuku, and their blades.

We also uncover the legend of the ultimate swordsmith, Nagasone Kotetsu, and his miraculous masterpiece— "Konkaidan"—a blade engraved with the absolute declaration: "On this Earth, nothing can stop this blade."

We'll even look into the myth of the "Ishidoro-giri", the sword said to have cleaved a solid stone lantern in half.

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