Yamamoto Tsunetomo (1659-1719) was a samurai retainer of the Saga clan before retiring to a hermitage near Saga Castle in Kyushu. This was brought about by his being legally prohibited in the 1660s from following his lord, Nabeshima Mitsushige, in death a samurai practice forbidden by the Tokugawa shogunate and the governing body of the Nabeshima fief.