Ju Jutsu is perhaps the Budo art that is most focused on self-defense. What then is self-defense?
Self-defense is everything you do to protect yourself and defend yourself against an attacker. You have no right to use more force than is absolutely necessary to be able to defend yourself. Your defense must be in proportion to the attack to which you are exposed. When the attack has stopped, then the right to protection also ceases.
Three conditions must be met in order to be able to claim protection:
• There must be an attack or threat of attack
• The attack must be current
• The defense must be necessary
The concept of self-protection does not only include self-defense, but includes everything one does to avoid himself be attacked.