This is the one!
In my business I am always on the lookout for those reference books that are going to assist me in positively identify a work of art and it's maker. When it comes to Japanese artist, this book, "Japanese Art Signatures" is the best I have ever found. It is the most complete, easy to use and well organized reference book on the subject that exists on the market, it has been a truly indispensable part of my reference library.
R. Yates
President, Asian Antiquities
( http://asian-antiquites.com )