Why is it customary to kneel while putting on a karate belt?

Answer 1

You bow in karate to show respect. You bow to your partner or opponent before you spar or train. You bow when entering or exiting the training area to show respect for it. And you bow to your instructor.

Answer 2

It isn't customary to kneel while putting on a karate belt and never has been.

Answer 3

It helps the instructors track your progress, so they can easily determine what level you are and what techniques you are working on.