- Birth: 1540
- Death: 1587
- Distinction: Lord of Hida
- Other Names: Anegakoji Yoshitsuna and Anegakoji Zeamon
- Title: Yamato no kami
- Children: Anegakoji Nobutsuna and Anegakoji Hidetsuna
Koretsuna was the son of Anegakoji (Mitsugi) Yoshiyori and resided at Takayama castle in Hida province. He was an ally of Oda Nobunaga, with whom he had a number of audiences. He defeated the Ema clan in 1582 and secured control of all Hida. Around this time Koretsuna came to believe that his eldest son Nobutsuna and a younger brother were plotting against him and ordered the deaths of both. In 1584-1585 he supported Sasa Narimasa when the latter defied Toyotomi Hideyoshi and as a result was attacked by Toyotomi forces under Kanamori Nagachika. He surrendered and afterwards retired to Kyoto, while his second son Hidetsuna committed suicide.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005