The Okinawan Tonfa was a farmers tool that was used for grinding rice and other farm chores. Sensei Demura who trained with Ryusho Sakagami who was a direct student of Kenwa Mabuni shows his lineage is impecable. This instructional teaches so much about the history of the tonfa and as well basics, bunkai and these two katas 1. Tonfa Kihon No Kata 2. Hamahiga No Kata. This entire series on Okinawan Kobudo is an absolute must have for anyone interested in authentic Okinawan Kobudo. Bullet Points. You Will Learn: *You will learn 2 authentic Okinawan Tonfa forms. * The history of the Tonfa. *The basics of the useage. * All kinds of great Bunkai focusing on the useage.