1487-1541. A daimyo of the age of provincial wars. The son of Soun Hojo. The castellan of Sagami Odawara Castle. In 1524, Ujitsuna advanced into Musashi after forcing Tomooki Uesugi to flee from Edo Castle to Kawagoe Castle (in the present Kawagoe City, Saitama Prefecture). Following the Battle of Kato, in which he fought against the daimyo Yoshimoto Imagawa, and the first Battle of Konodai, in which he defeated the allied forces of the shogun Ashikaga and Lord Satomi, Ujitsuna extended his power from the east of Suruga to Izu, Sagami, Musashi, Kazusa, and Shimousa. He focused his energy on expanding the Hojo family, which was founded by his father, Soun, in one generation, showing the power and authority of the Hojo family by completing the construction of Tsuruoka Hachimangu Shrine.
- Association with Minato City
Claimed victory at Hitotsugihara
Ujitsuna originally called himself Shinkuro Ise and changed his surname to Hojo in 1523. He did so to assert that he was the rightful ruler of Sagami and Musashi by calling himself Hojo, which held the reigns of the Kamakuga shogunate, against Tomooki Uesugi, who called him “a heretic from another country.” This is why Ujitsuna is sometimes called Atohojo (Ato = later). The year after he changed his surname, he defeated Tomooki Uesugi in the Battle of Takanawahara, seized Edo Castle (helped by the betrayal of the Ota brothers, Suketaka and Sukesada), and chased away the Uesugi forces, which fled to Kawagoe Castle. It was at Hitotsukihara (near Akasaka 5-chome) where Ujitsuna raised his flag in victory and lined up the heads of the enemies he had defeated.
Kokushi Daijiten (Comprehensive Dictionary of Japanese History) (Yoshikawa Kobunkan)(Yoshikawa Kobunkan)
Sengoku Hojo Ichizoku (Hojo Clan of the Age of Provincial Wars) (Motoki Kuroda / Shinjinbutsu Oraisha)
Site of the old Battle of Hitotsugi (near Akasaka 5-chome)
Atohojoshi Kenkyu (Study on Atohojo) (Tetsuo Owada / Yoshikawa Kobunsha)
Nihon Chusei Seiji Shakai no Kenkyu (Study on Japanese Political World in the Middle Ages) (Society for Publishing the 70th Anniversary Anthology of Prof. Makoto Ogawa / Sozugun Shorui Jukanseikai)