The Okinawan Karate solo-practice form Matsumura no Seisan is believed to be the oldest form in the arsenal. It is also believed to be the key form to understanding most Shorin-Ryu Kata. This book explains the actual history, separating folklore from fiction. The Kyan-ha performance of Seidokan and compared to other Shorin-ryu styles. The author uses known combative principles and subscriptions to feed into a three-stage decoding method showing 13 core applications. The derived applications are suitable for applying to any dojo syllabus.