I'm not to good at verbal descriptions but I tried.
These differ some from Rocky's rendition but then I suppose we learned
them at different times from different teachers. These technique
require the use of a bayoneted rifle or long spear, it is training
against long weapons the jo up. It requires two moves to get inside
Uke unlike the jo down to the hand which require one move.
Gokyo: Uke using a bayoneted rifle. Uke has the right hand in the
triggering position the left had around the barrel stock. He thrusts with
the bayonet at the abdomen (easier withdrawal than the chest). You slide
into his left side your right hand goes to the elbow as in Ikkyo and your
left palm up grasps his fingers from the bottom securing them on the stock
piece. If you were looking as you hands the right palm would be down and
the left up. Now proceed as in Ikkyo with your normal footwork.
Rokkyo: Uke using a spear from the right hand position. Left hand at
the base of the staff and right hand extended position as if thrusting
or reaping with a 9 foot spear. Slide in at the thrust. You will only
get half way in. Your right had goes to the elbow like ikkyo but with
the hand turned over the thumb on top. Your left hand goes to his left
hand as in Ikkyo, but grasping the thumb and fingers securing them
onto the shaft you will be holding his arm like a jo. If you looked at
your hands the right palm would be up and the left down. Apply
pressure to the elbow and thrust down as if his arm was a jo (be
careful you can snap the elbow with to much presser. Pin in this
position applying presser to the elbow (again be careful).
Nanakyo: Spear or rifle thrust, you slide in the right hand grasping
uke's left from the top, your left had grasping uke's left form the
bottom. Both you hands are securing his left (or lead hand) on the
weapon. Rotate his arm about a quarter turn so the elbow is up and
into your armpit. You can apply pusher at this point. If you can not
apply sufficient leverage to disarm him or brake the elbow, slide you
left foot across your front, it will be in front of uke. Now drop down
on your right knee and lean back across uke's back applying presser to
the elbow (be careful).
Hachikyo: Uke in the right handed position thrusts with the bayoneted
rifle or spear. You slide in but not so deep as the last time. You
grasp the rifle stock or spear shaft in your left hand and push it up
and toward his right shoulder. Grasping the lower part of the shaft
(between his hands) you pull. This gives you leverage on the weapon
and you can take uke down bring the blade of the weapon across the
back of uke's neck.