History of the style
Shukokai is a style of karate founded by Sensei Chojiro Tani in 1949.

Shukokai has evolved from careful analysis of the dynamics and principles of traditional karate. The lineage of Shukokai can be considered a direct descendant of its parent style, Shito-ryu. Being a direct descendant of Shito-Ryu, Shukokai inherits the characteristics of both the Naha-te and Shuri-te styles of Okinawan Karate.

Focus of the style
While Shukokai shares many of the same punches, kicks, and blocks found in other popular styles of Karate, it is in how these are executed that sets Shukokai apart.

The study of body mechanics is the primary focus with the end result being the delivery of the greatest impact with the least amount of effort. Another defining characteristic is that each technique must be combat effective.

Adapted from Wikipedia