Objective of the work is to explain general meaning and basic principles of Katas followed by research them in concrete Martial Arts. Object of research are the Katas in Karate, Judo and Iaido, where I will also explain their methodology of practice. Next I will compare Theory and Methodology of Katas in these particular Martial Arts by each other. The work it self consist from theoretical part, which contains general characteristic of Katas, history and characterstic particullary researched Martial Arts and their Katas. Practical part is formed by methodology of their training and practice and folowed by comparing of the Katas. On the end of the work you can find appendix contains photos. Main appendix is videorecorded these Katas: Nanahon me from Iaido, Nage no Kata from Judo and Gekisai Dai Ichi from Karate with grounding excercises of San Dan Gi and Renzoku Kumite and Kata Sanchin including practice Sanchin Shime from karate.\\