A Hereditary Book on the Art of War or Heihō kadensho (兵法家伝書), is a Japanese text on the theory and practice of swordsmanship and strategy, written by the samurai Yagyū Munenori in 1632.
[1] Alongside Miyamoto Musashi's The Book of Five Rings,[2] it is one of the preeminent treatises on warfare in classical Japanese literature.
Similar to Musashi's contemporary work, Munenori's has garnered appeal for its applicability beyond the warrior paradigm.
There are several mentions of how uneven terrain can make all the difference in battle and how a simple thing like a loose stone can turn the table on your enemy.
[4] The flags flown confirm the authenticity of it and give it the character of the one that belongs to it unified by the Miyamoto Musashi Dojo.