Tenbun
Tenbun, also transliterated as Tenmon, was a Japanese era name after Kyōroku and before Kōji. This period spanned from July 1532 through October 1555. The reigning emperor was Emperor Go-Nara of Japan.
Change of era
1532 Tenbun gannen: At the request of Ashikaga Yoshiharu, the 12th shōgun of the Muromachi Bakufu, the era name was changed because of various battles. The previous era ended and a new one commenced in Kyōroku 5, on the 29th day of the 7th month.
Events of the ''Tenbun'' era
23 September 1532 : Yamashina Hongan-ji set on fire. Hokke Riot in Kyōto.29 March 1535 : Go-Nara is formally installed as emperor.7 July 1541 : Takeda Harunobu banishes his father, Takeda Nobutora.4 September 1542 : Imagawa Yoshimoto, who was daimyō of 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.24 September 1543 : Portuguese ship drifts ashore at Tanegashima, and the gun is first introduced into Japan.July/August 1544 : Flooding in Heian-kyō and nearby areas.11 January 1546 : Ashikaga Yoshifushi becomes 13th Shōgun of the Ashikaga shogunate.1547 : Joseon-Japanese "Treaty of Tenbun", trading limited to Joseon port of Pusan and Sō clan commerce limited to 20 ships annually.28 January 1548 : Nagao Kagetora replaces his older brother Nagao Harukage as heir to Echigo Province, with triumphant entry in Kasugayama Castle.23 March 1549 : Nōhime, daughter of Saitō Dōsan, daimyō of Mino Province, marries Oda Nobunaga.27 July 1549 : Jesuit Catholic priest Francis Xavier arrives in Japan at Kagoshima15 December 1549 : Matsudaira clan of Mikawa Province fall under Imagawa Yoshimoto's rule. Matsudaira Takechiyo departs for Imagawa as a hostage.September 1551 : Tainei-ji incident - Sue Takafusa leads a coup d'etat within the Ōuchi clan, forcing the head of the clan, Ōuchi Yoshitaka, to commit suicide at Tainei-ji temple. Ōuchi vassal Mōri Motonari would soon defeat Takafusa at the Battle of Miyajima in 1555.March/April 1554 : Shogun Yoshifushi changes his name to Yoshiteru.