http://www.youtube.com/watch?v=NJSoxClqknM
With English subtitles. Traditional making of Japanese Katana swords, part 1: smelting of the special steel (Tamahagane) that is used for Katana swords. Smeltery Nittoho Tatara in Shimane.

http://www.youtube.com/watch?v=dS89evA31xo
With English subtitles. Part 2 of traditional making of Japanese Katana swords: The work of the sword smith. Beating out of the Tamahagane (special steel that is used for Katana swords) and folding the steel while forging. Combination of hard and soft steel to have a flexible yet sharp sword.

http://www.youtube.com/watch?v=B3uRDiWqGEg
With English subtitles. Part 3 of traditional making of Japanese Katana swords: Forging, preparation for heat treatment, drawing the hardening line (Hamon), heat treatment, engraving, signature.

http://www.youtube.com/watch?v=U_2rTqod4Qs
With English subtitles. Part 4 of traditional making of Japanese Katana swords: polishing of the Katana sword.