Tate-sankaku-gatame
(lengthwise triangular hold-down)
"Tori is situated much higher in relation to Uke.
Tori's left leg passes under Uke's deltoid and nape of the neck.
Tori's left instep is lodged in the popliteal hollow of Tori's
right knee. Tori's left arm encircles Uke's right arm and his
right hand holds Uke's collar behind Uke's left ear.
Uke's right forearm is blocked against the left side of Tori's
neck.Tori bends his head foreward, his right arm rests on the
mat as does his left ."