This is the 2/09 issue of Me no Me magazine in which Tanobe Sensei of the NBTHK wrote a comprehensive article on detecting fake signatures in Japanese swords. The article is in Japanese but when you buy the magazine, I will give you a free copy of the English translation of this article. It is a long article. The translation is 16 pages. It focuses on the Shinto and Shinshinto swords. This is an invaluable study for every collector's library. I have only a small number of these and when they are gone, they are gone.