[n 1] His Dharma name was Rōseiin Unsan Chisai Daidōji (漏世院雲山智西大童子).
In 1615, during the Siege of Osaka, Hideyori was defeated and committed suicide by seppuku, while his castle was taken by the forces of Tokugawa Hidetada and Tokugawa Ieyasu.
Kunimatsu, who was seven years of age at the time, was captured by Tokugawa forces, and was later executed by decapitation.
Theories and rumors in Japan say he could have escaped through some secret tunnel, and Tokugawa then set up an execution of a decoy or body double (known as a kagemusha), to make official the extinction of Toyotomi's bloodline.
This biographical article related to Japan is a stub.