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Tenbun (, also known as 天文) Temmon, was a Japanese era name ( after 年号 , "year name") nengō and before Kyōroku . This period spanned from July 1532 through October 1555. Kōji The reigning emperor was  Go-Nara -tennō (. 後奈良天皇)
Change of era
1532 Tenbun gannen (: At the request of 天文元年) Ashikaga Yoshiharu, the 12th of the shōgun , the era name was changed because of various battles. The previous era ended and a new one commenced in Muromachi Bakufu Kyōroku 5, on the 29th day of the 7th month.
Events of the Tenbun era
1532 ( Tenbun 1, 24th day of the 8th month): Yamashina Hongan-ji set on fire. Hokke Riot in Kyōto.
1536 ( Tenbun 5, 26th day of the 2nd month): Go-Nara is formally installed as emperor. 
1541 ( Tenbun 10, 14th day of the 6th month): Takeda Harunobu (later Takeda Shingen) banishes his father, Takeda Nobutora.
1542 ( Tenbun 11, 25th day of the 8th month): Imagawa Yoshimoto, who was of daimyō Suruga Province, conquered Tōtōmi Province; and from there, he entered Mikawa Province where he battled the daimyō of Owari Province, Oda Nobuhide. The Imagawa forces were defeated by the Oda army. 
1543 ( Tenbun 12, 25th day of the 8th month): Portuguese ship drifts ashore at Tanegashima, and the gun is first introduced into Japan.
1543 ( Tenbun 13, 7th month): There was flooding in Heian-kyō and nearby areas. 
1546 ( Tenbun 15, 20th day of the 12th month): Ashikaga Yoshihusi becomes 13th Shōgun of the  . Ashikaga shogunate 
1547 ( Tenbun 16): Joseon-Japanese "Treaty of Tenbun", trading limited to Joseon port of Pusan and Sō clan commerce limited to 20 ships annually. 
1548 ( Tenbun 17, 30th day of the 12th month): Nagao Kagetora (later Uesugi Kenshin) replaces his older brother Nagao Harukage as heir to Echigo Province, with triumphant entry in Kasugayama Castle.
1549 ( Tenbun 18, 24th day of the 2nd month): Princess Nō marries Oda Nobunaga.
1549 ( Tenbun 18, 3rd day of the 7th month): Jesuit Catholic priest Francis Xavier arrives in Japan at Kagoshima.
1549 ( Tenbun 18, 27th day of the 11th month): Matsudaira clan of Mikawa Province fall under Imagawa Yoshimoto's rule. Matsudaira Takechiyo (later Tokugawa Ieyasu) departs for Imagawa as a hostage. 1554 ( Tenbun 23, 2nd month): Shogun Yoshihusi was changed to Yoshiteru. 
^ Nussbaum, Louis-Frédéric. (2005). "
Tembun" in n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, Japan encyclopedia, p. 956; see Deutsche Nationalbibliothek Authority File Archived 2012-05-24 at Archive.today.
^ Titsingh, Isaac. (1834).
–382. Annales des empereurs du japon, pp. 372
^ a b Titsingh,
p. 381; n.b., Ashikaga Yoshihusi changed his name to Yoshiteru in 1554 ( Tenbun 23, 2nd month).]
^ Hall, John Whitney. (1997).
The Cambridge History of Japan: Early Modern Japan, p. 249.