How Japanese Masters Turn Sand Into Swords

This is a video about how Japanese samurai swords, aka katanas, are made – from the gathering of the iron sand, to the smelting of the steel, to the forging of the blade. Head over to and enter code 'Veritasium' for 100 free blades with the purchase of a razor. Make sure to add both the razor and the blades to your cart for the code to take effect. If you’re looking for a molecular modeling kit, try Snatoms, a kit I invented where the atoms snap together magnetically -

Courtesy of Veritasium on YouTube. Watch on YouTube ↗

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