Sword Sites
JapaneseSword.com
A large buy/sell/trade site specializing in samurai arms and armor.
Nihonto Message Board
Great place to interact with other collectors
E Japanese Swords
Information, sevices and items for sale
Nihonto Antiques
Information, sevices and items for sale
Namikawa Heibei Co
Best place to get your sword restoration items
Nihonto US
A site offering quality Swords and tosogu
Aoi Art Tokyo
Huge selection of Japanese swords and fittings for sale
Tokugawa Art
Huge selection of Japanese swords, fittings and Matchlocks for sale
Satcho
Lots of great books