While deciding the academic path as a professor of mathematics at the University of Tsukuba, he has been working as a master of Daito-ryu Aiki martial arts Yukiyoshi Sagawa for 20 years. The author talks about mathematical research, Aiki training life, and his teacher, Yukiyoshi Sagawa. In addition, Yukiyoshi Sagawa's technical photograph (photo commentary: author) also adds power to this book.
Summarizes the interviews with Mr. Tatsuo Kimura, which was held in the quarterly "Michi" predecessor and the quarterly "Aiki News", and also includes a newly written interview about Aiki, an interview with his younger brother Hiroshi Sagawa, and an undisclosed one. All of Yukiyoshi Sagawa spelled out in the photographs in the collection.
A partial English translation is included at the end of the book.
Length: 237 pages