OK, boys and girls, here is my understanding. Anko Itosu took from kusanku sho and kusanku dai, and created the Pinan kata's for the Okinawan School system in the very early 1900's. It seems that he taught different people slightly different versions. since then other styles have copied the kata, some it seems with slight differentiation, such as the Tamari styles use.. Shobayashi Shorin Ryu has a different take slightly then say Matsumura Seito, or Kobayashi. as to Naihanchi kata, my understanding is that shorin ryu got that from nana, so I would say its a version of a chinese kata. Chinto kata, was made by sohan 'bushi" Matsumura after he befriended a shipwrecked Chinese sailor. the sailor was stealing to survive and robbing to survive. Bushi Matsumura was sent to bring him in, and could not. so he befriended him, and learned from him. the Tamari version is very different then the shuri version. Shobayashi Shorin Ryu teaches the Tamari, and Matsumura Seito teaches the shuri versions. However the main influences on Okinawan Karate seem to be southern White Crane systems, and Monkfist boxing, and chaun fa ( fist way ). there may be some lesser influences from some other chinese systems but not nearly as much as those.