Hōjō Ujimasa
| Hōjō Ujimasa | |
|---|---|
| 北条 氏政 | |
| Hōjō Ujimasa | |
| Head of Later Hōjō clan | |
| In office 1559–1590 | |
| Preceded by | Hōjō Ujiyasu | 
| Succeeded by | Hōjō Ujinao | 
| Personal details | |
| Born | 1538 Sagami Province, Japan | 
| Died | August 10, 1590 (aged 51–52) Odawara Castle, Sagami Province, Japan | 
| Spouse(s) | Ōbai-in Hōshō-in | 
| Children | 12, including Hōjō Ujinao | 
| Parents | 
 | 
| Relatives | Lady Hayakawa (sister) Hōjō Ujiteru (brother) Hōjō Ujikuni (brother) Hōjō Ujinori (brother) Uesugi Kagetora (brother) Imagawa Yoshimoto (maternal uncle) Imagawa Ujizane (cousin and brother-in-law) Takeda Shingen (father-in-law) Takeda Katsuyori (brother-in-law) | 
| Military service | |
| Allegiance | Later Hōjō clan | 
| Rank | Daimyo | 
| Commands | Odawara Castle | 
| Battles/wars | Siege of Odawara (1561) Battle of Konodai (1564) Siege of Odawara (1569) Siege of Sekiyado (1574) Siege of Gion castle (1575) Kazusa Campaign (1577) Battle of Omosu (1580) Battle of Tenmokuzan (1582) Siege of Odawara (1590) | 
Hōjō Ujimasa (北条 氏政, 1538 – August 10, 1590) was the fourth head of the later Hōjō clan, and daimyō of Odawara. Ujimasa succeeded the territory expansion policy from his father, Hōjō Ujiyasu, and achieved the biggest territory in the clan's history.