Sakuma Morimasa (1554 - 83) is a retainer of Shibata Katsuie. Morimasa beat Nakagawa Kiyohide at the Battle of Shizugatake (1583) but persued his victory too far. His forces were surprised and crushed by reinforcements sent by Toyotomi Hideyoshi. Morimasa fled but was captured and beheaded.

The loss was so severe that Shibata Katsuie committed suicide.

The article is originally from OpenHistory.