Why do we stack our fists in Isshinryu?

This is a more advanced bunkai ,or application,of the stacking of the fists in the Isshinryu karate method. If you would like to learn more about Isshinryu Karate please check out my courses on Udemy.com! Search Isshinryu, Dissect the Dissection of Isshinryu orJon Oshita to learn more about this powerful art of karate.