There is no single master.
There was no single master - karate encompasses the product of an enormous number of practitioners.
You don't master karate at brown belt. You don't normally ever master karate. The best thing to do is to practice often and hard.
You don't earn anything for being a karate master. You can earn money for teaching and running a dojo or organization.
There is actually lots of different types of karate but in the karate i do the grand master is sensei ken WA mabooni
You bow. That's it.
Master Wu Gang
A Dan represents everlasting and you will soon be a master.
Bob the builder. And you better believe it.
A karate instructor is usually called "Sensei" or master. Sensei means "one who has gone before" or teacher in Japanese.
Master the arts of parkour, karate and gymnastics