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Shōsōin
Periods Paleolithic 35,000–14,000 BC Jōmon 14,000–1000 BC Yayoi 1000 BC – 300 AD Kofun 300–538 AD Asuka 538–710 Nara 710–794 Heian Former Nine Years' War Later Three-Year War Genpei War 794–1185 Kamakura Jōkyū War Mongol invasions Genkō War Kenmu Restoration 1185–1333 Muromachi Nanboku-chō period Sengoku period 1336–1573 Azuchi–Momoyama Nanban trade Imjin War Battle of Sekigahara 1573–1603 Edo (Tokugawa) Tokugawa shogunate Invasion of Ryukyu Siege of Osaka Sakoku Perry Expedition Convention of Kanagawa Bakumatsu Meiji Restoration Boshin War 1603–1868 Meiji Ryūkyū Disposition Invasion of Taiwan (1874) Satsuma Rebellion First Sino-Japanese War Treaty of Shimonoseki Triple Intervention Invasion of Taiwan (1895) Colonization of Taiwan Boxer Rebellion Russo-Japanese War Treaty of Portsmouth Japan–Korea Treaty Colonization of Korea 1868–1912 Taishō World War I Intervention in Siberia Great Kantō earthquake 1912–1926 Shōwa Militarism Financial crisis Nanking incident Mukden Incident Invasion of Manchuria May 15 incident February 26 incident Anti-Comintern Pact Tripartite Pact Second Sino-Japanese War World War II Attack on Pearl Harbor Pacific War Atomic bombings Soviet–Japanese War Surrender of Japan Occupation of Japan Postwar Japan Anpo protests Economic miracle Asset price bubble 1926–1989 Heisei Lost Decades Great Hanshin earthquake Cool Japan Tōhoku earthquake Imperial transition 1989–2019 Reiwa COVID-19 pandemic Abe assassination Noto earthquake 2019–present
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Glossary History Timeline

Kyōtoku (享徳) was a Japanese era name (後花園天皇) after Hōtoku and before Kōshō. This period spanned the years from July 1452 through July 1455.^[1] The reigning emperor was Go-Hanazono-Tennō (後花園天皇).^[2]

• 1452 Kyōtoku gannen (享徳元年): The era name was changed to mark an event or a number of events. The old era ended and a new one commenced in Hōtoku 4.

• 1453 (Kyōtoku 2, 6th month): The name of the Shōgun, "Yoshinari", was changed to Ashikaga Yoshimasa, which is the name by which he is more commonly known in the modern era.^[3]
• 1454 (Kyōtoku 3): Ashikaga Shigeuji orchestrated for the killing of Uesugi Noritada,^[4] thus beginning a series of conflicts for control of the Kantō; and this event would come to be known as the Kyōtoku no Ran.^[5]

• Hall, John Whitney. (1988). The Cambridge History of Japan: Medieval Japan. Cambridge: Cambridge University Press. ISBN 978-0-521-22354-6
• Nussbaum, Louis Frédéric and Käthe Roth. (2005). Japan Encyclopedia. Cambridge: Harvard University Press. ISBN 978-0-674-01753-5; OCLC 48943301
• 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

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