Final answer:
The Sengoku period in Japanese history was a time of social upheaval, political intrigue, and military conflict. It ended with the unification of political power under the Tokugawa shogunate.
Step-by-step explanation:
The Sengoku period, also known as Sengoku jidai, was a period in Japanese history marked by social upheaval, political intrigue, and near-constant military conflict. It was named after the otherwise unrelated Warring States period. The Sengoku period ended in 1600 after the Battle of Sekigahara, when Tokugawa Ieyasu defeated the other military leaders and unified political power under the Tokugawa shogunate. This led to the Tokugawa period, also known as the Edo period, which brought peace, economic development, and significant social and cultural changes to Japan.