Mashita Nagamori, Japanese daimyo (b. 1545)
Mashita Nagamori (増田 長盛, 1545 – June 23, 1615) was a daimyō in Azuchi–Momoyama period, and one of the Go-Bugyō appointed by Toyotomi Hideyoshi.

Also called Niemon (仁右衛門) or by his court title, Uemon-no-jō (右衛門尉). He was sent to Korea as one of the Three Bureaucrats with Ishida Mitsunari and Asano Nagamasa.