A style of aikido from the "ki school". Shin-shin Toitsu Aikido, translated "Aikido with Mind and Body Unified", was founded by Koichi Tohei. Tohei-sensei places a great deal of emphasis on understanding the concept of Ki and developing this aspect independently of the Aikido training for application to general health and daily life.

This style is one of the softest styles of Aikido and is characterized by soft movements that often involve the practitioner jumping or skipping during the movement. Most schools are not concerned with practical application of the techniques, considering them exercises to further develop ki.