Here, Soke Anshu is teaching a ninjutsu lesson on the use of makibishi, at the Budo Ryu Kai Hombu Dojo. The term makibishi (撒き菱 or 撒菱) refers to the Japanese version of the caltrop, which is a sharp spiked object that was used in feudal Japan to slow down pursuers and also was used in the defense of samurai fortifications.
