Kyusho is known in China as 'Dim Mak' the famed 'death touch'. Is this truth or legend ? The Chinese say that if a certain part of the body is even lightly touched at the correct time of the day then injury or even death will occur within a set time limit. 
What is certain is that the points shown below can all be used at any time of the day to control an opponent with ease.
Within Ninjutsu the teaching of these pressure points is seen as basic training. To control someone with a touch is better than to have a stand up fight.