Haya nawajutsu (早縄術) is a fast way to snare a person (shibori gata (絞型) in Japanese), in contrast to tie someone (shibari gata (縛型) in Japanese).
The ideal was to apply hayanawa (translates to “fast rope”, or “noose” as we call it) on the opponent within 10 seconds, skillfully, beautifully and without risk of damage to the opponent.
Hayanawa is used merely to arrest persons suspected of crimes. Because the person was not a convicted felon before trial, no knots were used to avoid inflicting shame. Being tied down was a great shame in ancient Japan, and often associated with torture.
Instead of knots only loops or rope that was wrapped around itself a couple of times and then hold the free end of the rope with one hand, as in the picture above.
Rope length could vary depending on the school. Each school had its methods and it was not until Shibunoka’s (city police consisting of ex-ninja) active period in the Tokugawa regime that practices began to be standardized. The nawa (used in shibari gata) could be between 3.5 and 11 fathoms while Hayanawa ranged from 2.5 to 3.5 arms. Some schools used the much shorter rope hayanawa, others could for example have a hook at one end (kaginawa; 鈎縄) .
Within Takagi Yōshin-Ryū (高木陽心流) for example, used 10-15 cm long strings (Sansunjō; 三寸縄 and Gosunjō kakehō; 五寸縄掛方) and towels (tenugui; 手拭) to lock people. This is usually classified as kari nawajutsu (provisional rope techniques; 仮縄術).
A specialty of Gyokushin-ryū was haya nawajutsu in a form of entanglement of the enemy with the help of a double folded string (himo waza; 紐技) with one or more loops, or by hooking it (Kagi Nawa). To achieve this, it requires Hatsumi Sensei an extreme ability to jūtaijutsu