Kata are the textbooks or even the soul of karate. It is all the more astonishing that the application of these training forms, the so-called Bunkai, is often neglected, practiced unsuitably for self-defense, or even completely ignored. The two authors have practiced karate for more than 30 years, focusing on self-defense and Kata application. They have set themselves the task of using the example of the well-known for centuries Kata Tekki (Shodan, Nidan & Sandan) to develop a method to represent the application of Kata in a generally understandable and user-friendly way. With more than 50 examples, starting with simple rambling through to attacks with weapons,