It is customary for all karate participants to show respect. The standing bow (ritsu-rei) is executed upon entering and leaving the dojo. A standing bow is also exchanged between practitioners at the beginning and end of a contest. Classes always begin with a bow (za-rei) to the sensei (teacher.) In traditional schools the highest ranking belt calls out Sensei, ni-rei (bow to sensei) at which point both sensei and students bow to each other.

Many karate styles have incorporated this symbol into their crest, patches and styles.