Often referred to as Yaku Kobujutsu these earlier systems allowed the arrest of armed felons in order that they could be brought to justice. Later these systems became known as Keijutsu or “Police Techniques”.
In 1947 the Tokyo Police reviewed these systems and their technical committee took techniques from the classical styles of Kenjutsu, Jojutsu and Jujutsu. They then added techniques from the more modern systems of Karate-jutsu, Judo, Jujutsu and Kendo to create a system they named Taiho Jutsu or “Arresting Techniques”.
Taiho Jutsu was supplemented with further systems such as,
Keijo-Jutsu which taught the use of a medium length hardwood fighting stick.
Hojo-jutsu or methods of binding a prisoner with rope to prevent escape.
Keibo-soho which covers the use of the short wooden truncheon or baton.
Tokushu Keibo-soho or the use of a metal extendable truncheon.
The Taiho Jutsu Kihon Kozo (fundamentals of Taiho Jutsu) was published by the committee and has since been subjected to periodic reviews to ensure that the system remains effective.
Further information can be found in the work Modern Bujutsu and Budo by Donn F Draeger.