Have you ever wondered how traditional Japanese katanas were made centuries ago? YouTube show Man at Arms shows you every step of the incredibly complex process by forging a replica of a Hattori Hanzō katana from the movie Kill Bill.

If you’re still feeling curious after watching the 18-minute video, you can also check out how they made a replica of Sephiroth’s Masamune sword from Final Fantasy VII, or Squall’s Gunblade from Final Fantasy VIII. So awesome.

Via Kottke.