Ki Aikido, also known as Shin Shin Toitsu Aikido, is a specific form of Aikido that focuses on the use of "Ki" (life energy) as the foundation for the practice of martial techniques. The history of Ki Aikido is linked to the life and teaching of Koichi Tohei (1920-2011), one of the most famous students of Morihei Ueshiba, the founder of Aikido.

Koichi Tohei was born on January 20, 1920 in Tokyo, Japan. He became a student of Morihei Ueshiba in the 1940s and soon became a leading member in the Aikido organization. Tohei was known for his dedication to spiritual practice and his deep understanding of the concept of "Ki".

During his journey into the world of Aikido, Tohei developed a specific approach that incorporated awareness of "Ki" into martial movement and technique. In 1971, Tohei founded Ki no Kenkyukai (Society for the Study of Ki), an organization dedicated to the study and dissemination of Ki Aikido.

Ki Aikido places a strong emphasis on mind-body coordination and Ki management to achieve greater efficiency in movements and execution of techniques. Furthermore, this discipline focuses on the development of inner unity and the ability to maintain calm and serenity even under stress or pressure.

Tohei traveled around the world to promote Ki Aikido and its philosophy. His openness in sharing his knowledge of Ki and his practice made him a significant influence in the spread of Aikido throughout the world.

Today, Ki Aikido is taught in several organizations and schools around the world, keeping alive the legacy of Koichi Tohei and his vision of Aikido based on Ki and the importance of him in martial arts practice and daily life.