Kōji (Muromachi period)
|History of Japan|
Kōji (弘治) was a Japanese era name (年号 nengō, "year name") after Tenbun and before Eiroku. This period spanned the years from October 1555 through February 1558. Reigning emperors were Go-Nara-tennō (後奈良天皇) and Ōgimachi-tennō (正親町天皇).
Change of era
- 1555 Kōji gannen (弘治元年): The era name was changed to mark an event or a number of events. The old era ended and a new once commenced in Tenbun 24.
The name originates from the following Chinese passage: 「祇承宝命、志弘治体」.
Events of the Kōji era
- 1555 (Kōji 1, 1st month): A border war began between Mōri Motonari, daimyō of Aki Province, and Sue Harukata, daimyo of Suō Province.
- 1555 (Kōji 1, 11th month): The Mōri forces surrounded the Sue defenders in the Battle of Itsukushima. When the outcome of the battle became clear, Sue Harutaka committed suicide; and others, including Odomo-no Yoshinaga, followed Harutaka in suicide. This victory, and the subsequent consolidation of the Mōri holdings were owing to Motonari's four sons: Mōri Takamoto, Kikkawa Motoharu, Hoda Motokiyo, and Kobayakawa Takakage.
- 1555 (Kōji 1): The forces of Takeda Shingen and Uesugi Kenshin met at the confluence of the Saigawa and the Chikumagawa in Shinano Province; and the fighting was known as the Battles of Kawanakajima.
- 1556 (Kōji 2): The Ōmori silver mine fell into the control of the Mōri clan during a campaign in Iwami Province.
- September 27, 1557 (Kōji 3, 5th day of the 9th month): Emperor Go-Nara died at age 62.
- Nussbaum, Louis-Frédéric. (2005). "Kōji" in Japan encyclopedia, p. 545; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see Deutsche Nationalbibliothek Authority File Archived 2012-05-24 at Archive.is.
- Titsingh, Isaac. (1834). Annales des empereurs du japon, pp. 372–382.
- Titsingh, p. 382.
- Sansom, George. (1961) A History of Japan, 1334–1615, p. 246.
- Sansom, p. 257.
- Nussbaum, Louis Frédéric and Käthe Roth. (2005). Japan Encyclopedia. Cambridge: Harvard University Press. ISBN 978-0-674-01753-5; OCLC 48943301
- Sansom, George Bailey. (1958). A History of Japan, ISBN 9780804705257; ISBN 9780804705240; OCLC 16859819
- Titsingh, Isaac. (1834). Nihon Ōdai Ichiran; ou, Annales des empereurs du Japon. Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. OCLC 5850691
- National Diet Library, "The Japanese Calendar" -- historical overview plus illustrative images from library's collection
| Era or nengō