Wikipedia
Hojōjutsu
Hojōjutsu (捕縄術), or Torinawajutsu (捕縄術), or just Nawajutsu (縄術), is the traditional Japanese martial art of restraining a person using cord or rope (said nawa 縄 in Japanese). Encompassing many different materials, techniques and methods from many different schools, Hojōjutsu is a quintessentially Japanese art that is a unique product of Japanese history and culture.
As a martial arts practice, Hojōjutsu is seldom if ever taught on its own but as part of a curriculum under the aegis of the body of study encompassed by a larger school of bugei or budō, often as an advanced study in jujutsu. Whatever their source, Hojōjutsu techniques and methods are seldom demonstrated outside Japan.