Ieyasu's victory over the western daimyo at the Battle of Sekigahara (1600) gives him virtual control of all Japan.

He rapidly abolishes numerous enemy daimyo houses, reduces others, such as that of the Toyotomi, and redistributes the spoils of war to his family and allies.

Ieyasu still fails to achieve complete control of the western daimyo, but his assumption of the title of shogun helps consolidate the alliance system.

After further strengthening his power base, Ieyasu is confident enough to install his son Hidetada (1579-1632) as shogun and himself as retired shogun in 1605.

The Toyotomi are still a significant threat, and Ieyasu devotes the next decade to their eradication.

In 1615 the Toyotomi stronghold at Osaka is destroyed by the Tokugawa army.