This is from the Kata Gyokko Ryu Ninjutsu Kosshijutsu Ge ryaku no maki
This is from the Ryu Ha Gyokko Ryu Ninjutsu
Ichi Geki (One Blow)
This technique"s meaning is to knock down the Uke in a single strike. What is important here is to is to push the Ukes right elbow up high enough so as to create unbalance before the next movement.
Both clasp both hands in Hanno Hon Itsu Gassho and bow to each other. Then, you stand in Ichimonji no Kamae and the Uke steps back with the left leg and draws his sword.
The Uke stands in Seigan no Kamae.
The Uke then changes into Dai Jodan no Kamae. At that instant jump in with the left foot forward and place your left hand onto the Ukes right elbow - press into the nerve point (Hoshi) with your left thumb and press the elbow up to unbalance the Uke. Then, strike downwards to the Ukes left Kimon with a right Boshi Ken. The Uke will slump at this point and will be off balance. This should be done all at once to take balance effectively.
Then, with your right foot, kick to the Ukes Suigetsu to drop the Uke.
Finish in Ichimonji no Kamae. Zanshin.
Revenge has a long memory.