For those who like to know some basics about Samurai and Katana forging. Please see the documentary videos below:
The Samurai Sword
Secrets of the Samurai Sword
Thanks to the uploaders and all rights belongs to original documentary publishers.
Source:
[1] LiveAboveAndBeyond (11/6/2013), THE SAMURAI SWORD: THE MAKING OF THE PERFECT SWORD (Full Documentary), retrieved from: http://www.youtube.com/watch?v=E0ke3uWt8a8
[2] Discover Japan (23/12/2012), Secrets of the Samurai Sword, retrieved from: http://www.youtube.com/watch?v=LtulTGxJdDc
Associations
All Japan Swordsmith Association: 全日本刀匠会 (ぜんにほんとうしょうかい/ Zen Nihon Toushoukai)
http://www.tousyoukai.jp/index.shtml
The Society for Preservation of Japanese Art Swords/ The Japanese Sword Museum:日本美術刀剣保存協会・刀剣博物館 (Nihon Bijutsu Touken Hozon Kyoukai/ Touken Hakubutsukan)
http://www.touken.or.jp/ (In Japanese)
The Foundation of Japanese Sword Culture for the Purpose of Public Interest
日本刀文化振興協会 (Nihontou Bunka Shinkou Kyoukai)
http://www.nbsk-jp.org/index.html (In Japanese)
http://www.nbsk-jp.org/eng-top.html (In English)
Sword Forum International (SFI)
http://www.swordforum.com/forums/content.php
UK Sword Buyer’s Guide
http://www.sword-buyers-guide.com/sword-sellers-in-europe.html