Kokikai (光気会) is a style of Aikido, founded by Shuji Maruyama. The organization is called Kokikai Aikido International. Maruyama Sensei's approach to aikido is "Minimum effort, Maximum effect".
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”.
The style lists four basic principles:
Keep One point (to develop calmness)
Find Correct Posture (in everything)
Develop your Positive Mind
Shuji Maruyama continues to develop the art, so there is no set textbook way of performing any technique.
Maruyama Sensei was originally sent to the United States in 1966 by the Aikikai Hombu. He taught in the US for many years. When Koichi Tohei Sensei left Aikikai to found Ki-Aikido, Maruyama Sensei followed him. This was consistent with Japanese martial arts tradition, because he was a direct student of Tohei Sensei. Maruyama Sensei separated from Ki-Aikido in 1986 to found the Kokikai organization.
As of August 2008, the directory on the official Kokikai website listed dojos in Australia, Canada, Israel, Japan, Russia and 19 US states