Munenobu was the eldest son of Endo Motonobu and succeeded his father when the latter committed suicide in 1585. He distinguished himself in Date Masamune's battles with the Ashina and Sôma. He was succeeded after his death by his younger brother Endo Shikibu-taiyu Harunobu.
References
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005