Jogan

Start and End of an Era: ^{[4] [5] [1]}

• The 15th day of the 4th moon of the 3rd year of Tannan (May 20, 859 according to the Julian calendar );
• The 16th day of the 4th moon of the 19th year of the Jogun (according to the Julian calendar - June 1, 877).

The name Nango was borrowed from the classical Chinese composition of the Book of Changes ^[4] : 「天地 之 道 、 貞 観 者 也」 ^[4] .

Dzogan-Eikho ( Jap. 貞 観 永 宝 ) - coins that were minted in 870

• 859 year (1st moon of the 1st year of Jögan) - all New Year holidays were suspended due to national mourning for the deceased emperor Montoku ^[6] ;
• 866 year (8th year of Dzögan) - Fujiwara clan concentrated in his hands the position of regent sessho ;
• 864 year (5th moon of the 6th year Dzogan) - Mount Fuji erupted in 10 days; from the crater flew a huge amount of slag and ash, which reached the Gulf of Edo . There were casualties, many residential buildings suffered;
• 869 year (the 11th year of Dzogan) - a son was born to the emperor, who in the following year was declared heir to the throne ^[7] ;
• July 9, 869 (the 11th year of Jogun) - earthquakes and tsunamis swept across the country , destroying most of the Sanriku coast near Sendai ;
• 876 (the 11th moon of the 18th year of Jögön) - the emperor Saves conceded his throne to his five-year-old son, who after some time reigned under the name of the emperor Yozei ^[7] ;
• 870 year (12th year of Dzogan) - the completion of amendments ( Jap. 貞 観 格式 ) to the basic law of ritsuryo was completed .

The table below shows the correspondence of the Japanese traditional and European numerals. The name of the corresponding year from the 60-year cycle of the Chinese system Gan-chi is indicated in brackets to the year number of the Japanese era. The Japanese months are traditionally called moons .

^{* The} asterisk is marked with short months (moons) lasting 29 days. The remaining months last 30 days.

• Kontsevich L.R. Chronology of the countries of East and Central Asia . - Moscow: Eastern Literature of the Russian Academy of Sciences, 2010. - p. 695-803. - 806 s. - ISBN 978-5-02-036350-2 .
• Petrova O.P., Goreglyad V.N. Board Mottos // Description of Japanese Manuscripts, Prints and Old Printed Books. Issue I .. - Moscow: Eastern literature , 1963. - p. 204-210. - 243 s.
• History of Japan / Ed. A. E. Zhukova. - Moscow : Institute of Oriental Studies, Russian Academy of Sciences , 1998. - T. 1. From ancient times to 1968 - 659 p. - ISBN 5-89282-107-2 .
• Eliseev D. History of Japan. Between China and the Pacific Ocean / lane. with fr. M. Yu. Nekrasov. - St. Petersburg: Eurasia, 2008. - 318 p. - ISBN 978-5-8071-0296-7 .
• (fr.) Isaac Titsingh . Nihon Odai Itiran, or Review of Imperial Rule in Japan = Nipon o daï itsi ran, ou, Annales des empereurs du Japon. - Paris, 1834. - 460 p.