B650.  Japanese Spears: Polearms and Their Use in Old Japan by Roald & Patricia Knutsen.  2004 1st edition.  Hardbound with dust jacket, 7 1/4 x 10″, about 220 pages in English.  There are surprisingly few book on this subject and I can’t think of another in English.  Very thorough: the 1st 128 pages are text, discussing the differt forms and how they were used in warfare, and the rest of the book is illustrations: drawings and photos to match the text.  Also touches on the martial art of the polearm.

The book is like new. 1 pound, 14 ounces.  $85.