- Birth: 1527
- Death: 1576
- Titles: Kii no kami, Harima no kami, Owari no kami
- Distinction: Kawachi warlord
Takamasa was a son of Hatakeyama Harima no kami Masakuni (whose other sons included Masayori and Akitaka) and resided at Takaya castle in Kawachi province. He clashed with the Miyoshi clan between 1559 and 1560 and in 1568 was established in Takaya Castle by Ashikaga Yoshiaki. Takamasa lost Takaya to a rebellious retainer named Yuza Nobunori in 1573 and while the castle was subsequently retaken by Oda Nobunaga, Takamasa was not reinstated.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005