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Genki ( was a 元亀) Japanese era name ( after 年号 , "year name") nengō and before Eiroku . This period spanned the years from April 1570 through July 1573. Tenshō The reigning emperor was  Ōgimachi -tennō (. 正親町天皇)
Change of era
Genki gannen (; 1570: The era name was changed because of various wars. The previous era ended and a new one commenced in 元亀元年) Eiroku 13, on the 23rd day of the 4th month.
Events of the Genki era
1570 ( Genki 1, 6th month): The combined forces of the Azai clan, led by Azai Nagamasa, and the Asakura clan, led by Asakura Yoshikage, met the forces of Oda Nobunaga in a shallow riverbed which has come to be known as the Battle of Anegawa. Tokugawa Ieyasu led forces which came to the aid of Oda's army; and Oda claimed the victory. 
1571 ( Genki 2, 9th month): Nobunaga marched into Ōmi Province at the head of his army which surrounded Mt. Hiei. He massacred the priests and everyone else associated with the mountain temples; and then he gave orders that every structure on the mountain should be burned. 
1572 ( Genki 3, 12th month): Takeda Shingen, the of daimyō Kai Province, led his army into Tōtōmi Province where he engaged the forces of Tokugawa Ieyasu at the Battle of Mikatagahara.  1573 ( Genki 4, 2nd month): Yoshinaka began to fortify Nijō Castle; and he sent messages to Azai Nagamasa, Asakura Yoshikage, and Takeda Shingen, announcing his intention to engage Nobunaga. 
^ Nussbaum, Louis-Frédéric. (2005). "
Genki" in n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, Japan encyclopedia, p. 238; see Deutsche Nationalbibliothek Authority File.
^ Titsingh, Isaac. (1834).
Annales des empereurs du Japon, p. 383.
^ Hisashi, Fujiki
et al. (1981). "The Political Posture of Oda Nobunaga", in Japan Before Tokugawa, p. 169.