This definitive volume presents a comprehensive exploration of Aikido, tracing its development from the life and spiritual quest of its founder, Morihei Ueshiba, through the efforts of the second D¿shu, Kisshomaru Ueshiba, who guided its spread and public recognition, to the initiatives of the current D¿shu (Moriteru Ueshiba) that have supported its continued global growth. Beginning with the founder's formative experiences and key encounters with figures such as Sokaku Takeda and Onisaburo Deguchi, the book follows the establishment of Aikido in Tokyo, its postwar expansion, and its emergence as an international martial art. Alongside this historical narrative, it explains the philosophy that has shaped Aikido, the training methods that embody its ideals, and the essential principles underlying its techniques-from basic body movement and koky¿ power to the wide range of technical variations. Both historical record and practical guide, this authoritative work offers readers a thorough understanding of Aikido's origins, development, and enduring principles. About the Author Moriteru Ueshiba was born on April 2, 1951, in Tokyo. He is the D¿shu (hereditary headmaster) of Aikido, having succeeded to the position in 1999. His father was the second D¿shu, Kisshomaru Ueshiba, and his grandfather was the founder, Morihei Ueshiba. After graduating from the Faculty of Economics at Meiji Gakuin University, he joined the Aikikai Foundation. He served as Executive Director of the Aikikai and Chief Instructor of the Aikikai Hombu Dojo. He currently holds several key positions, including Chairman of the Aikikai Foundation, President of the International Aikido Federation, Director of the Nippon Budokan Foundation, and Councillor of International Budo University. In 2013, he received the Medal with Blue Ribbon. He was conferred an Ansheta Medal from Brazil, a Friendship Medal from the Russian President, and was also awarded the Gold Medal of the University of Valencia. His main publications include Aikid¿: Keiko to Kokoro (Training and the Spirit of Aikido) (Naigai Publishers) and Kaitei Shinpan Kihan Aikid¿ Kihon-hen (Revised New Edition Standard Aikido: Basic Volume) (Shuppan Geijutsusha), among others.