Chikamori was the 3rd son of Ôtomo Yoshishige (Sôrin). He was baptized as a Christian in 1580 and was adopted by Tawara Chikakata the following year. He was present for the 1587 battle of Hetsugigawa and led troops in the 1st Korean Campaign. After his elder brother Yoshimune was deprived of his domain Chikamori became a retainer of Hosokawa Tadaoki and gave up Christianity.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005