 Ashi-Hishigi

Ashi-Hishigi also called an Achilles lock or simply an ankle lock, is a technique described in both "The Canon Of Judo" by Kyuzo Mifune and "Brazilian Jiu-Jitsu, Theory and Technique" by Renzo Gracie and Royler Gracie as well as demonstrated in the video, The Essence Of Judo.It is classified as a joint lock (Kansetsu-waza), and is not a recognized technique of the Kodokan.