"but what other reasons do you have fivedragons?"
Just tradition, but what it means is that you are pointed in the direction of the Earth's rotation. You're expressing the intent of the planet you are an organ of, to continue on the path.
You're doing the kata, and the universe is doing you.
What I mean by organ, what we consider "human consciousness" is really the spirit of the mother Earth and the father sun we are born of.
Kind of trippy, but there it is. We are the world.