KISSHOMARU UESHIBA became the second Aikido Doshu (leader)
after the Founder and his father, Morihei Ueshiba. He was the
author of the popular The Spirit of Aikido and co-author of
MORITERU UESHIBA, the third and present Aikido Doshu, wrote the preface to this book. He is the son of Kisshomaru Ueshiba, and the author of Progressive Aikido, Best Aikido, and The Aikido Master Course.