Ushiro-kesa-gatame
(back kesa-gatame)
"This is really a reversed kesa-gatame. With Uke in a prone
position and Tori operating kesa-gatame, Tori turns his body to
the left to face Uke's feet. As you do this, release your left
hand, which is holding Uke's right arm; now take hold of Uke's
right arm, whilst still turning, with your right hand at a position
on the end of his sleeve or alternatively, holding his belt. 
Secure
a tight grip with all of your right forearm and upper arm around
his right arm. The left arm crosses Uke's body and holds tightly
on to his belt, on the lft hand side of his body. The elbow and
forearm rest on the floor between the left hand side of Uke's
body and armpit."
