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.
Special thanks to our Patreon supporters! Join this list to help us keep our videos free, forever:
If you’re looking for a molecular modeling kit, try Snatoms, a kit I invented where the atoms snap together magnetically -
▀▀▀
A massive thank you to John McBride for making this entire project happen. This would not have been possible without John. Please check out his japan walking tours
Massive thanks to Craig Mod, Inoue-san, everyone in the Tanabe family, and Takanashi-san. Also a massive thank you to Kevin Cashen –
▀▀▀
References:
Tanii, H., Inazumi, T., & Terashima, K. (2014). Mineralogical study of iron sand with different metallurgical characteristic to smelting with use of Japanese classic iron-making furnace “Tatara”. ISIJ international, 54(5), 1044-1050.
Tate, M. (2005). History of Iron and Steel Making Technology in Japan Mainly on the smelting of iron sand by Tatara. Tetsu-to-Hagane, 91(1), 2-10.
Krauss, G. (1999). Martensite in steel: strength and structure. Materials science and engineering: A, 273, 40-57.
Krauss, G., & Marder, A. R. (1971). The morphology of martensite in iron alloys. Metallurgical Transactions, 2, 2343-2357.
Yalçın, Ü. (1999). Early iron metallurgy in Anatolia. Anatolian Studies, 49, 177-187.
Kapp, L., Kapp, H., & Yoshihara, Y. (1987). The craft of the Japanese sword. Kodansha International.
Matsumoto, C., Das, A. K., Ohba, T., Morito, S., Hayashi, T., & Takami, G. (2013). Characteristics of Japanese sword produced from tatara steel. Journal of Alloys and Compounds, 577, S673-S677.
Inoue, T. (2010). Tatara and the Japanese sword: the science and technology. Acta Mechanica, 214(1), 17-30.
Images & Video:
Great video from NHK –
▀▀▀
Special thanks to our Patreon supporters:
Adam Foreman, Anton Ragin, Balkrishna Heroor, Bill Linder, Blake Byers, Burt Humburg, Chris Harper, Dave Kircher, David Johnston, Diffbot, Evgeny Skvortsov, Garrett Mueller, Gnare, I.H., John H. Austin, Jr. ,john kiehl, Josh Hibschman, Juan Benet, KeyWestr, Lee Redden, Marinus Kuivenhoven, Max Paladino, Meekay, meg noah, Michael Krugman, Orlando Bassotto, Paul Peijzel, Richard Sundvall, Sam Lutfi, Stephen Wilcox, Tj Steyn, TTST, Ubiquity Ventures
▀▀▀
Directed by Petr Lebedev
Written by Petr Lebedev and Derek Muller
Edited by Trenton Oliver, Jack Saxon, Peter Nelson
Animated by Fabio Albertelli, Jakub Misiek, David Szakaly
Filmed by Petr Lebedev and Lui Kimishima
Produced by Petr Lebedev, Derek Muller, Han Evans, Giovanna Utichi, Emily Taylor
Additional research by Gregor Čavlović
Thumbnail by Peter Sheppard
Additional video/photos supplied by Getty Images
Music from Epidemic Sound
1 view
928
264
2 months ago 00:29:05 1
Antique Japanese Samurai Armour. How was it made?
2 months ago 00:04:01 1
Laura Branigan - Self Control - All Night Fuji (1984)
2 months ago 00:09:14 1
Your Body Killed Cancer 5 Minutes Ago
2 months ago 00:03:35 1
The Boys Japanese Dub Must Be Seen To Be Believed
2 months ago 03:12:02 1
HAPPY MORNING MUSIC - Start Your Day With Positive Energy | Morning Meditation Music For Wake Up
2 months ago 00:03:34 1
2 Minute Diet - What is the Okinawa Diet? *Blue Zone Diets and Living to 100*
2 months ago 00:05:15 1
How to Make a Popup that Folds Basic Shape ’a Circle’ from 3D into flat
2 months ago 00:14:51 1
How I Created a Unique Knife from an Old Motorcycle Chain
2 months ago 00:12:14 1
English Speaking Skills - How Would You Do Things - Advanced English Daily Conversation Practice
2 months ago 00:02:12 1
OUTDOOR TRADITIONAL TATTOO | OZRNH
2 months ago 00:10:33 1
Easy English Speaking Practice - Group Projects - Beginner English Conversation Language Skills
2 months ago 00:03:35 1
NAGANO TONIC REVIEW [BEWARE!] Nagano Tonic Reviews Does It REALLY Work - BUY NAGANO LEAN BODY TONIC
2 months ago 00:01:35 1
Let’s Get it Started | TWEWY AMV
2 months ago 00:03:23 1
Painting Flowers | Neku x Shiki [ neo twewy spoilers ]
2 months ago 00:21:38 1
Meet the AI ‘WIVES’ of the Future: Hyper-Realistic ROBOTS You Won’t Believe! |Travel Documentary
2 months ago 00:08:51 1
Benn vs Ennis / Lubin VS Murtazaliev / Naoya Inoue vs Sam Goodman
2 months ago 00:19:41 1
How Is This Even POSSIBLE?! Building World’s Smallest REAL Game Boy Color
2 months ago 00:08:55 1
10 Top Tips for growing bonsai shohin pines
2 months ago 00:01:37 1
[FREE] SHADOWRAZE x ZXCURSED x HARD PHONK х DOTA RAP TYPE BEAT 2024 “IMPOSTER“
2 months ago 00:15:31 1
I made a Chef Knife for a Michelin Chef
2 months ago 00:07:35 1
How to Read and Write Hiragana Alphabet | Learn Japanese for Beginners
2 months ago 00:01:26 2
【竹】How to write the kanji for “bamboo or take“ in Japanese “take“ and stroke order
2 months ago 00:23:02 1
「MASTER キートン」風なコマ割りをお見&
2 months ago 01:18:20 1
Black & White 2 (2005) - PC Gameplay 4k 2160p / Win 10. Великолепная игра на ПК. Всех времëн. Обзор.