The kama a martial arts weapon that started as a sickle that Okinawan farmers used to harvest their rice crops. Unlike other tools such as the bo and sai—which are normally made of wood or bamboo—the kama has a sharp cutting edge. In this video, Fumio Demura sensei teaches the fundamentals of proper kama use, including proper grips, strikes, stances, counters and defenses. Fumio Demura studied under Japanese master Ryusho Sakagami and Okinawan master Kenshin Taira. Demura has won the All-Japan Karate Free-fighting Championships (1961), twice been voted into the Black Belt Hall of Fame and is recognized the world over as one of the premier martial artists of all time.