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.
Early life and rise
In 1538, Ujimasa was born as the second son of Hōjō Ujiyasu. His childhood name was Matsuchiyo-maru (). As Ujiyasu's first son, Shinkuro, died young, Ujimasa became the apparent heir of Ujiyasu.
In 1554, when Ujiyasu make an alliance with Takeda Shingen and Imagawa Yoshimoto, Ujimasa took a daughter of Shingen, Obai-in, for his lawful wife.
Upon Ujiyasu's retirement, Ujimasa inherited formal leadership of the family around 1559.
Hōjō Campaign
In 1560, Hojo clan seized Iwatsuki Castle and almost conquered whole Musashi Province.
See also
- Battle of Omosu