It seems that the kata was most likely spread into the Shito Ryu and other lineages via Sokon Matsumura (1809-circa 1902). In particular, historical records indicate that he learned it from a Chinese sailor who may have been shipwrecked on Okinawa. However, it has been pointed out that this Chinese man, referred to as Chinto or Anan (both names being associated with two different kata, of course), probably taught a small number of other karate masters around 1800, and that the spread of karate in Okinawa may indeed be through more than one Matsumura.
Traditional karate is one of the most efficient self-defense systems. The basis of karate is formed by simple basic techniques that are internalized automatically and are quickly retrievable under extreme psychological pressure. Women have a realistic chance with Traditional Karate even against physically superior opponents.
However, Traditional Karate is much more than self-defense:
“Karate is a holistic training for body and mind. It incorporates a higher philosophy, hundreds of years of tradition, a code of honor, and many health, energy, and even spiritual aspects of a traditional martial art.”
These bunkai are found in kata applications across all styles of Karate. The tutorial also covers counters and reversals to these grappling techniques (gyaku-waza) so you can learn how to defend and escape the submissions with counter-lock.