In my opinion our Charts and Kata make up our system of Isshinryu whereas sparring is the application of what we have learned.

Charts are the core of our system, our basic building blocks introducing us to proper body mechanics, targeting, breathing, range, footwork, etc…

Whereas Kata is the library of our art. Kata is the means by which we pass along the techniques that Master Shimabuku created or incorporated into the Art of Isshinryu.