In the past, it was expected that about three years were required to learn a single kata, and usually even an expert of considerable skill would only know three, or at most five, kata.
Gichin FunakoshiIt is important that karate can be practiced by the young and old, men and women alike. That is, since there is no need for a special training place, equipment, or an opponent, a flexibility in training is provided such that the physically and spiritually weak individual can develop his body and mind so gradually and naturally that he himself may not even realize his own great progress.
Gichin FunakoshiOne of the most striking features of karate is that it may be engaged in by anybody, young or old, strong or weak, male or female.
Gichin Funakoshi