The siege of Osaka was a series of battles undertaken by the Japanese Tokugawa shogunate against the Toyotomi clan, and ending in that clan's destruction. Divided into two stages, and lasting from 1614 to 1615, the siege put an end to the last major armed opposition to the shogunate's establishment. The end of the conflict is sometimes called the Genna Armistice , because the era name was changed from Keichō to Genna immediately following the siege.

The Tokugawa shogunate, also known as the Edo shogunate , was the military government of Japan during the Edo period from 1603 to 1868.