速さ

Speed is one of the two aspects of Power, the other being Strength.

Developing Power is the key to physical performance in Sumou and is the most important part of preparation via Keiko.

Therefore, cultivating Speed is one of the most important factors of Keiko.

Some of the exercise of Power Lifting, a part of Keiko, are focused on developing Speed.

Certain parts of the Basic Sumou exercises are also concerned with building Speed, notably Suriashi and Teppou, especially Ooteppou.