"Nunchaku: Karate Weapon of Self-Defense" by Fumio Demura is a paperback book released in 1971 that focuses on the art of self-defence using the nunchaku, a traditional karate weapon. The book, written in English, provides detailed instruction on the techniques and principles of using the nunchaku effectively for defensive purposes. Demura, a renowned expert in karate, shares his knowledge and expertise in the book, making it a valuable resource for those interested in learning about this unique form of self-defence.