For 10 points, name this book outlining the precepts of bushido, a work by Yamamoto Tsunetomo sometimes called the "Book of the Samurai."
The standard English translation of this work was the first done by William Scott Wilson. This book notes that, over the past 50 years, men's pulse has become the same as women's, in one of its many lamentations that what it calls the "old days" are fading. This book recommends focusing on the present moment, as well as daily meditation on death and plunging recklessly towards it, since it says that death is the only way to realize its central concept. Despite being a loyal (*) retainer, this book's author did not commit suicide after his master's death due to his master's disapproval of the practice, thus living to create this Tokugawa-era book from thousands of personal commentaries. For 10 points, name this book outlining the precepts of bushido, a work by Yamamoto Tsunetomo sometimes called the "Book of the Samurai."
The standard English translation of this work was the first done by William Scott Wilson.
Hagakure [or Hidden by the leaves; accept similar rough translations like Beneath the Leaves; accept Analects of Nabeshima; prompt on "Book of the Samurai" or similar answers that don't involve the words]