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Hōgen (保元) was aJapanese era name (年号,nengō; lit. "year name") afterKyūju and beforeHeiji. This period spanned the years from April 1156 through April 1159.^[1] The reigning emperors wereEmperor Go-Shirakawa-tennō (後白河天皇) andEmperor Nijō-tennō (二条天皇).^[2]

• January 24, 1156Hōgen gannen (保元元年): The new era name was created to mark an event or series of events. The previous era ended and a new one commenced inKyūju 3, on the 24th day of the 4th month of 1156.^[3]

• July 20, 1156 (Hōgen 1, 2nd day of the 7th month): CloisteredEmperor Toba-in died at age 54.^[4]
• July 28–August 16, 1156 (Hōgen 1, 10th-29th days of the 7th month): TheHōgen Rebellion,^[5] also known as theHōgen Insurrection or theHōgen War.
• 1156 (Hōgen 1, 9th month): Thenaidaijin Fujiwara Saneyoshi was namedsadaijin. Thedainagon Fujiwara Koremichi becamenaidaijin. After the war, tranquility was restored throughout the empire; and the emperor himself was in charge of the government. A special building was constructed in Kyoto, where—as in the days ofEmperor Go-Sanjo, requests and complaints were received and examined.^[6]
• 1157 (Hōgen 2, 8th month): Sanjō Saneyuki was dismissed from his position asdaijō-daijin; and in the same month, thesadaijin Saneyoshi died. Theudaijin Fujiwara no Munesuke was madedaijō-daijin. Thenaidaijin Koremichi was madesadaijin. Fujiwara no Moresane, who was the 15-year-old son of son ofkampakuFujiwara no Tadamichi, becameudaijin. Thedainagon Sanjō Kinori, who was the son of Saneyuki, obtained the position ofnaidaijin.^[6]
• 1157 (Hōgen 2, 10th month): The foundations are laid for a grand audience hall (dairi) in the palace. There had not been such a structure within the palace compound since the time ofEmperor Shirakawa.^[6]
• August 6, 1158 (Hōgen 3, 11th day of the 8th month): In the 3rd year of Go-Shirakawa's reign (後白河天皇25年), the emperor abdicated; and the succession (senso) was received by his eldest son.^[7]
• 1158 (Hōgen 4, 8th month): Emperor Nijō is said to have acceded to the throne (sokui).^[8]

• Brown, Delmer M. and Ichirō Ishida, eds. (1979).Gukanshō: The Future and the Past. Berkeley: University of California Press.ISBN 978-0-520-03460-0;OCLC 251325323
• Nussbaum, Louis-Frédéric and Käthe Roth. (2005).Japan encyclopedia. Cambridge:Harvard University Press.ISBN 978-0-674-01753-5;OCLC 58053128
• Titsingh, Isaac. (1834).Nihon Odai Ichiran; ou,Annales des empereurs du Japon. Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland.OCLC 5850691
• Varley, H. Paul. (1980).A Chronicle of Gods and Sovereigns: Jinnō Shōtōki of Kitabatake Chikafusa. New York:Columbia University Press.ISBN 9780231049405;OCLC 6042764

• National Diet Library, "The Japanese Calendar"-- historical overview plus illustrative images from library's collection

• 1150s in Japan
• Japanese eras
• 12th-century neologisms

• Articles with short description
• Short description is different from Wikidata
• Articles containing Japanese-language text