Hagakure Kikigaki: Hidden Leaves

Hagakure Kikigaki, or Hagakure, is a practical and spiritual guide for a warrior, drawn from a collection of commentaries by the samurai Yamamoto Tsunetomo, former retainer to Nabeshima Mitsushige, the third ruler of what is now Saga prefecture in Japan. Tsuramoto Tashiro compiled these commentaries from his conversations with Tsunetomo from 1709 to 1716; however, it was not published until many years afterwards. Hagakure is also known as The Book of the Samurai, Analects of Nabeshima or Hagakure Analects.
The book records Tsunetomo's views on bushido, the warrior code of the samurai. Hagakure is sometimes said to assert that bushido is really the "Way of Dying" or living as though one was already dead, and that a samurai must be willing to die at any moment in order to be true to his lord. His saying "the way of the warrior is death" was a summation of the willingness to sacrifice that bushido codified.