- Birth: 1567
- Death: 1614
- Distinction: Toyotomi retainer
- Japanese: 秋月種長 (Akizuki Tanenaga)
Tanenaga was born on 3/17/1567, a son of Akizuki Tanezane. He held a 20,000-koku fief at Takanabe in Hyûga Province. He commanded 1,000 troops in the 1st Korean Campaign (1592-93) and later chose to support Ishida Mitsunari in the Sekigahara Campaign (1600). Thanks to the help of Mizuno Katsushige he was able to keep his lands after Ishida's defeat. He died on 7/19/1614.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005