Prince Nashimoto Morimasa (??????, Nashimoto no miya Morimasa o, 9 March 1874 – 2 January 1951) was a member of the Japanese Imperial Family and a field marshal in the Imperial Japanese Army.
An uncle-in-law of Emperor Showa, an uncle of his consort, Empress Kojun, and the father-in-law of Crown Prince Euimin of Korea, Prince Nashimoto was the only member of the Imperial Family arrested for war crimes during the American occupation of Japan following the Second World War.