this is my first forum post and have a interesting question about the pinan/heian katas. Why did master itosu choose to create five pinan/heian katas,does anyone have an credible answer to this? My own thought on this is, as karate means empty-hand as we all know and is a means of self-defence,the human hand contains four fingers and a thumb,again as we are all aware equals five. Did master itosu one day look at his hands and decide to create the five pinan/heian katas from this theory?
Any other theorys and thoughts would be really appreciated