What is 4th kata?

Excuse me, could you possibly clarify what you mean by "4th kata"? Is this referring to a specific martial arts technique, a stage in a process, or perhaps a terminology used in a particular field that I'm not familiar with? If it's related to cryptocurrency or finance, I'm not immediately aware of a direct connection, but I'm curious to learn more about the context in which this term is being used. Could you provide some additional information or context to help me understand what you're referring to?