| Morimasa | |
|---|---|
| Prince Nashimoto | |
 Prince Nashimoto Morimasa, 1935 | |
| Prince Nashimoto | |
| Reign | 2 December 1885 – 14 October 1947 |
| Head of Nashimoto-no-miya | |
| Reign | 2 December 1885 – 2 January 1951 |
| Born | 9 March 1874 Kyoto, Japan |
| Died | 2 January 1951 (aged 76) Shibuya-ku, Tokyo, Japan |
| Spouse | Itsuko Nabeshima (m. 1897) |
| Issue | Yi Bangja (Ri Masako), Crown Princess of Korea Hirohashi Noriko |
| Father | Prince Kuni Asahiko |
| Mother | Harada Mitsue |
| Military career | |
| Allegiance |  Japan |
| Service |  Imperial Japanese Army |
| Years of service | 1899-1944 |
| Rank | field marshal  |
| Commands | 1st Brigade 16th Division |
| Battles / wars | Russo-Japanese War Second Sino-Japanese War World War II |
| Awards | |
Morimasa, Prince Nashimoto (梨本宮守正王, Nashimoto no miya Morimasa ō, 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 Hirohito (Emperor Shōwa), an uncle of his consort, Empress Kōjun, 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 Allied occupation of Japan following defeat in the Second World War.