The book is The Yasukuni Swords: Rare Weapons of Japan 1933-1945 (http://www.amazon.com/Yasukuni-Swords-Weapons-Japan-1933-1945/dp/4770027540) by Tom Kishida (Kodansha International, 2004, ISBN 4-7700-2754-0). (Mr. Hetley, for reference, you might want to check out some of the other books in the "Customers Who Bought This Book Also Bought" listing. As it is, I think that I'm going to have to sell a lot of plants to afford all of the books on swordsmithing I want to get.)