Isshin-Ryu is an Okinawan karate style that was established in 1956 by Tatsuo Shimabuku. "Isshin-Ryu" is the literal translation of "One Heart Way.

" Its distinctiveness originates from the incorporation of strategies from various traditional Okinawan combat systems, such as Kobudo, Shorin-Ryu, and Goju-Ryu. The approach prioritizes pragmatic methods of self-defense, with an emphasis on formidable strikes, kicks, blocks, and grappling techniques.

Traditional Okinawan weapons training is also incorporated into Isshin-Ryu, including the bo (staff), sai (metal truncheon), tonfa (handled club), and nunchaku (flail). Isshin-Ryu is characterized by its emphasis on fluid transitions between techniques and natural body movements, which enables practitioners to rapidly adapt to a variety of combat situations.

In addition, the cultivation of mental discipline and physical fortitude is emphasized. In its entirety, Isshin-Ryu is considered an all-encompassing system of martial arts that fosters individual growth, physical fitness, and self-defense.

It maintains an international presence with schools and practitioners, and it undergoes ongoing development as a result of diverse interpretations and adaptations by instructors and practitioners. .