YOKO SHIHO GATAME + HADAKA JIME

1. Yoko Shiho Gatame
To perform the technique enter from side and kneel next to your opponents side. Place one arm underneath their head to grip the back of the collar. The other arm goes through and underneath their leg. This hand secures a grip on the belt. If not within reach then grip the skirt of their gi. Then place your chest on theirs, facing towards their head, to help prevent them pushing your head away. Articulate your gripping positions and lower your hips. Tori's leg should be bent and placed close to Uke to prevent any shrimping maneuver.

2. Hadaka Jime  
Hadaka Jime and others chokes applied from the rear. The practice of choking and strangulation techniques is a subtle art that requires more attention to detail. The english term "choking" in Judo technically refers to the constriction or blockage of the windpipe which prevents breathing, and "strangulation" technically means compression of the arteries to prevent blood from reaching the brain. However, in this article and in most Judo classes the term choking techniques is synonymous with all of the kinds of shimewaza.There are three basic ways of choking or strangling an opponent, as well as some combinations of the three:

1. Compression of the carotid arteries on one or both sides of the neck restricting the flow of blood and oxygen to the brain.
2. Compression of the windpipe (trachea) stopping or reducing the flow of air to the lungs.
3. Compression of the chest and lungs preventing the opponent from inhaling (often used during pinning techniques).  

Credit to Neil Ohlenkamp.