Hayanawa 早縄
The "fast rope" of Japanese arrest practice, a thin cord carried for binding a captured person quickly, as opposed to the formal honnawa.
Hayanawa means “fast rope”. Japanese dictionaries describe it as a rope carried so that a person who has been caught can be tied up at once, and treat it as another name for the capture rope, torinawa. Heibonsha’s encyclopedia says that in the Edo period it was the rope used for the arrest itself, about two and a half hiro long.
English Wikipedia describes it as a strong, thin cord, usually three to four millimeters across, and notes that samurai sometimes used the sageo cord of their sword scabbard for the purpose. Japanese Wikipedia places it after the control techniques of jitte or jūjutsu, and mentions rope ends fitted with an iron ring or hook to speed up the binding.