Sengoku Daimyo No Kachu Koso Fushi Kyodai Ichizoku Kashin Ha Naze Araso No Ka? (Seikaisha Shinsho)

[Machine Translation] The late fifteenth century onward was a time of warring feudal lords. The feudal lords had to fight not only against other feudal lords of other countries, but also against the enemies of their families and households. This was because warring feudal lords did not necessarily follow their vassals and subjects with absolute power, but with the support of the family and vassals of the head of the family. If the head of the family was judged to be incompetent, the family and vassals would rebel in order to install a new head. Even if they were blood relatives, the warfare was fierce and ruthless. Based on reliable historical documents and previous research, this book takes a sharp look at the essence of the times and why the feudal lords of the Warring States fought among those closest to them.

十五世紀後半以降、戦国大名が争った時代。大名たちは他国の大名と戦うだけでなく、一族や家中の敵と戦わなければならなかった。戦国大名は必ずしも絶対的な権力で家臣や領民を従わせているわけではなく、当主の一族や家臣の支持により成り立っていたからである。もしも当主が無能と判断されれば、新しい当主を擁立するために一族や家臣から謀反を起こされた。それが血を分けた親子や兄弟であっても、抗争は激しく非情なものとなった。本書は信頼できる史料や先行研究に基づき、なぜ戦国大名は身近な者同士で戦ったのか、時代の本質に鋭く迫る。