Sasumata (刺股) is a fork spear used by samurai in feudal Japan, also known as a man grabber. Sasumata along with two other weapons called tsukubo and sodegarami were used by police samurai and security forces to arrest criminals and suspects without harming them or controlling crowds. The Sasumata looks like a 2-pointed fork with a 2-meter stick full of thorns to prevent the individual from holding on to the bar.
Nowadays, a modern version of sasumata is still occasionally used by the police as a tool for self-defense. These modern sasumata are often made of aluminum, without sharp blades and spikes. They also they can be found in public places in Japan, such as schools, where they are used to protect against intruders or violent assailants.
Sasumata in Japanese schools
Many schools in Japan have guarded a Sasumata to stop intruders and school intrusions. This weapon is very useful if the person is not armed, it works in Japan because it is rare to find a weapon there.
It is common to find Sasumata in a strategic place hanging on the wall, or stored in a place with items prepared against invasion. Sometimes it is possible to find a shield beyond Sasumata to protect yourself or to strategically advance against the enemy. When immobilizing a person with Sasumata the next smart action would be to tie him up and secure him.
Some cases in Japan that used Sasumata: In Aichi a 62-year-old man entered Ichinomiya's school with a kitchen knife, 3 teachers used a Sasumata and stopped the invader. Something similar happened in Tokyo, and again 3 teachers caught the suspect with Sasumata, the school principal said that they were trained for such occasions.
See some videos of Sasumata in Action below: