Ankokuji Ekei (安国寺 恵瓊?, 1539 – November 6, 1600) was a diplomat of Mōri clan, a powerful feudal clan in the Chūgoku region, Japan, as well as a Rinzai Buddhist monk following the Azuchi-Momoyama period of the 16th century. He fought in the Shikoku campaign for Toyotomi Hideyoshi, and was given a fiefdom of 23,000 koku in Iyo Province as a reward. He participated in the Imjin War, and lost the Battle of Uiryong to Gwak Jae-u.
When he fought against Tokugawa Ieyasu at the Battle of Sekigahara (1600), he was taken prisoner and later decapitated in Kyoto, along with Ishida Mitsunari and Konishi Yukinaga.