This book is the autobiography of himself who served three generations of the Mori family, Motonari MORI, Terumoto MORI, and Hidenari MORI, and who participated in many battles.
これは毛利元就から毛利輝元、毛利秀就の3代に仕え、数多くの戦に参加した吉保の自叙伝である。