Sakakibara Yasumasa (1548-1606) was a daimyo of the late Sengoku and early Edo Period serving under the Tokugawa clan. Yasumasa was considered one of the Tokugawa clan's greatest military commanders, and was labeled as one of its 'Four Guardian Kings' (Tokugawa-shitenno), bearing the court title of 'Shikibu-Sho'.

Toyotomi Hideyoshi (1536/1538-1598) was a preeminent daimyo of the same era, and regarded as Japan's second 'great unifier'. He brought about the end of the Warring States Period, and ruled during a preiod known as the Momoyama Period, named after Hideyoshi's castle.

Japan went through various cultural advances under Hideyoshi's rule, such as the edict that only the samurai class could bear arms, as well as the construction and restoration of various temples in Kyoto. He also infamously ordered the execution of twenty-six Christians by crucifixion.