Kata is a set pre-arranged combination of movements that simulate attack and defense. It is often performed with slow moving techniques (not full power and speed). Almost all martial art forms have different katas that reflect directly to that specific Ryu (style). Different martial art styles may use the same kata, changing a block or strike. Within a particular Ryu, the individual techniques taught at separate schools my be different depending upon the teachers strengths, but the katas for that Ryu are always performed the same way. Kata links all schools in a particular Ryu by ensuring that identical techniques and common movements are learned by all students. Katas increase in difficulty as a student increases in rank. There are also Katas for weapons.

When executing kata, perfect form, movement, stance, speed, rhythm, spirit, balance and power are essential. In tournaments, these are the criteria that the person performing the kata is judged against. It is also important to note that it is impossible to master any kata. The whole concept behind kata is to constantly practice, improving the form and technique. It is the movement, not the completion that holds significance. Many practice kata for the sense of centering that the movements have on the individual. This is because kata is as much mental as it is physical.