Bujinkan Ura Gyaku

While omote gyaku explores how the spine bends backwards and how that locks the body up, ura gyaku explores how it locks when the spine is bent forward.

The direction that you take your training partner down and over is key so they cannot take ukemi- it is on a diagonal, almost stretching them forward so they crash down on their face and stomach.

Hon gaku naturally changes from ura gaku.