Motokuni was one of Bessho Nagaharu's chief advisors, and committed suicide with him when Miki castle surrendered to the Oda in 1580. His son Mototsugu was spared and placed in the care of Kuroda Yoshitaka.
References
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005