Part of a series on the
History of Japan
List Paleolithic before 14,000 BC Jōmon 14,000 – 1000 BC Yayoi 1000 BC – 300 AD Kofun 300 AD – 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 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 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 2019–present
Topics Currency Earthquakes Economy Era names Education Empire Foreign relations Geography Historiography Religion Buddhism Christianity Islam Judaism Shinto Military Naval Politics Post-war Science and technology Sports World Heritage Sites
Glossary History Timeline
v t e

Tengen (天元) was a Japanese era (年号, nengō, "year name") after Jōgen and before Eikan. This period spanned the years from November 978 through April 983.^[1] The reigning emperor was En'yū-tennō (円融天皇).^[2]

Change of era

• February 20, 978 Tengen gannen (天元元年): The new era name was created to mark an event or a number of events. The previous era ended and a new one commenced in Jōgen 3, on the 15th day of the 4th month of 978.^[3]

Events of the Tengen era

• 978 (Tengen 1, 8th month): The emperor allowed the daughter of Fujiwara no Kaneie to be introduced into his household; and shortly thereafter, they had a son.^[4]
• 978 (Tengen 1, 10th month): Fujiwara no Yoritada was elevated to the position of Daijō-daijin; Minamoto no Masanobu was made Sadaijin; and, Fujiwara no Kaneie was made Udaijin.^[4]