This document discusses martial arts and self-defense. It describes two strategic methods in martial arts: the hard method which uses direct attacks and strikes, seen in arts like karate and boxing, and the soft method which uses indirect force like redirection, seen in arts like judo and wrestling. It also discusses the legal justifications for self-defense, including innocence, imminence and proportionality. Benefits of martial arts are mentioned like confidence, awareness and discipline. Weaker points on the body that one should protect are listed. Judo is defined as a grappling art that follows the soft method of redirection in its throwing techniques.