A triangle choke, or sankaku-jime (三角絞) in Judo, is a type of figure-four chokehold which strangles the opponent by encircling the opponent's neck and one arm with the legs in a configuration similar to the shape of a triangle. The technique is a type of lateral vascular restraint that constricts the blood flow from the carotid arteries to the brain. The triangle choke was seen in early Kosen judo competition. Tsunetane Oda, a judo groundwork specialist who died in 1955, had demonstrated the triangle choke on video. The move is often utilized in mixed martial arts, usually by Brazilian Jiu-Jitsu practitioners.