Kansetsu Waza (Joint Lock Techniques).  Kansetsu Waza (Joint Lock Techniques).  Master Okada will show you so many locking techniques you will surely be impressed.  Many of these are the secret techniques he learned from the Master of all Masters, when it comes to ground work - Oda Sensei.  He created many of these himself, prior to WWII.  Of course Master Okada has made many variations and improvements on these original techniques.  Now he has some of the top UFC and MMA guys scratching their heads in amazement, as he teaches them at his senior age of 75.  Learn form the Master directly, as he teaches you, along with Hal Sharp's excellent narration and explanation of these techniques.

https://www.youtube.com/watch?v=_WnmG9jJSOk&t=15s