Sanetaka was the second son of Satomi Shigeyoshi (1448-1505) and succeeded his elder brother Yoshimichi (1480-1518). He struggled to solidify his hold over the Satomi clan while expanding his clan's influence. He clashed with Hôjô forces at Kamakura in 1524, opening a long feud between the two houses. He suffered the defection of a number of his retainers and committed suicide in September 1533 when under attack by his nephew Satomi Yoshitoyo.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005