Katō Kiyomasa
The sayings of Sengoku-period retainers and warlords such as Katō Kiyomasa (1562–1611) and Nabeshima Naoshige were generally recorded or passed down to posterity around the turn of the 16th century when Japan had entered a period of relative peace. In a handbook addressed to "all "samurai", regardless of rank", Katō states: