Complex sentence: The chapter "Private Memoirs of the Shoguns" is focusing on the several Shoguns, their lives and rule and therefore, shows an extensive amount of biographies and histories on the individual Shoguns and their families.
Split into simpler sentences: The chapter "Private Memoirs of the Shoguns" is focusing on the several Shoguns, their lives and rule. It contains an extensive amount of biographies and histories on the individual Shoguns and their families.