Nihon (Japanese) Goshin (Self-Defense) Aikido was founded by Master Shodo Morita in Hokkaido, Japan. Soke (founder) Shodo Morita was a student of Sokaku Takeda and Yoshida Kotaro in Daito Ryu Aiki Jiu-Jitsu. Master Kotaro also trained in his family's system of self-defense. In addition to training in Daito ryu, Master Morita trained in Judo, Kobudo (weapons), Karate, and the esoteric arts. After mastering these arts, Master Morita realized that although they were highly effective, no single style was complete. Each art focused on a separate element of self-defense: The karate arts focused on striking. The judo arts focused on throwing. The jujitsu arts focused on joint locks.
Master Morita incorporated principles and techniques of each system into a new system called Nihon Goshin Aikido. It is significant to note that he did not merely choose the best techniques from each system, but a variety of techniques, recognizing that what works well for one person may not be effective for a second person due to height differences. Nihon Goshin Aikido is a highly effective form of martial arts due to its variety of principles. This resulted in a highly effective system of self defense for today's man or woman.