What is the 5th kata?

Excuse me, could you please clarify what you mean by "the 5th kata"? Are you referring to a specific martial arts form or technique? If so, it would be helpful if you could provide more context or specify which martial art you're inquiring about, as different styles have their own unique set of katas. Alternatively, if you're referring to something else entirely, perhaps in the realm of cryptocurrency or finance, I'd be happy to help, but I'll need a bit more information to give you an accurate answer.