Kokikai (光気会) is a style of Aikido, founded by Shuji Maruyama.
The Kokikai style emphasizes natural movement, ki development, relaxation, good posture and mind-body coordination.
It is a minimalist martial art that focuses on making techniques effective while using little physical effort.
An axiom of the style is “minimum effort for maximum effect.” The name Kokikai means “school of radiant ki”.
This was consistent with Japanese martial arts tradition, because he was a direct student of Tohei.