Also known as: Sano Ujitada

Houjou Ujitada was the sixth-(possibly seventh-) born son of Houjou Ujiyasu (or possibly his brother Houjou Ujitaka), fifth son to survive childhood, younger brother of Houjou Ujimasa, Houjou Ujiteru, Houjou Ujikuni, and Houjou Ujinori, and older brother of Houjou Saburou (Uesugi Kagetora) and Houjou Ujimitsu. (There are also theories that he was the son of Houjou Ujitaka, Ujiyasu's younger brother). He married Jousan'in (sp?—乗讃院), daughter of Sano Munetsuna in 1586 upon Munetsuna's death in battle against Nagao Akinaga and became the head of the Sano Clan. (Later, however, the Sano Clan was absorbed by the mighty Houjou.)

During the Siege of Odawara, Ujitada barricaded himself in Odawara Castle. After the battle, he followed Houjou Ujinao to Mt. Kouya and later lived a reclusive life in Izu. After his death in 1593, Toyotomi Hideyoshi allowed his uncle-in-law Sano Fusatsuna to assume the title of clan head of the Sano Clan.