The work of Yagyῡ Munenori from 1632 concerns martial arts and military science. It is translated by Thomas Cleary and can be found tucked behind Miyamoto Musashi‘s “the Book of five rings” from 1643. Both these texts analyse conflict between two men armed with swords and scale this up bigger battles. These important treaties on swordsmanship, and have been taken as giving lessons on life in general.