Astronomy - Tenbun

Japanese: 天文 - てんぶん

The Japanese era name (nengo). It was the era name of Emperor Gonara from 1532 to 1555 during the Muromachi period ( Sengoku period). The previous era name was Kyoroku. The era name was Kouji . The era name was changed on July 29, 1532 (Kyoroku 5). It was done to put an end to the misfortunes of war (disaster and a new era name). The name was taken from the Zhouyi (Book of Changes ). The Shoguns of the Muromachi Shogunate during the Tenbun era were Ashikaga Yoshiharu (the 12th Shogun ) and Ashikaga Yoshiteru (the 13th Shogun ). In 1541 (Tenbun 10), Takeda Harunobu (later known as Takeda Shingen ) banished his father, Takeda Nobutora, the guardian of Kai Province, to Suruga Province, inherited the family headship, and began his invasion of Shinano Province. In 1546 ( Tenbun 15), Shogun Ashikaga Yoshiharu was defeated in a battle with Hosokawa Harumoto and fled to Sakamoto in Omi, handing the position of Shogun to his eldest son, Yoshiteru . Yoshiharu died in exile in Omi Anato in 1550 (Tenbun 19). In 1548 (Tenbun 17), Nagao Kagetora (later known as Uesugi Kenshin ) inherited the family headship and moved into Kasugayama Castle. In 1555 (Kōji 1), Motonari Mori defeated the large army of Harukata Sue on Itsukushima in Aki Province, annexing the former territories of the Ouchi clan and establishing his position as a feudal lord in the Sengoku period. In 1543 (Tenbun 12 ), a Portuguese merchant was cast ashore on Tanegashima, introducing firearms to the country (some say they were introduced in 1542). ◇It can also be read as "Tenmon."

Tenmon [astronomy]

⇒Astronomy

Source: Kodansha Encyclopedia of Japanese Era Names Information

Japanese:

日本の元号（年号）。室町時代（戦国時代）の1532年から1555年まで、後奈良(ごなら)天皇の代の元号。前元号は享禄(きょうろく)。次元号は弘治(こうじ)。1532年（享禄5）7月29日改元。兵革（戦乱）の凶事を断ち切るために行われた（災異改元）。『周易(しゅうえき)』（『易経(えききょう)』）を出典とする命名。天文年間の室町幕府の将軍は足利義晴(よしはる)（12代）、足利義輝(よしてる)（13代）。1541年（天文10）、武田晴信(はるのぶ)（後の武田信玄(しんげん)）は甲斐国守護の父武田信虎(のぶとら)を駿河国に追放して家督を相続し、信濃国への侵攻を開始した。1546年（天文15）には、将軍の足利義晴が細川晴元との戦いに敗れて近江坂本に避難し、嫡男の義輝に将軍職を譲った。義晴は、1550年（天文19）に近江穴太(あのう)で客死している。1548年（天文17）には長尾景虎(かげとら)（後の上杉謙信(けんしん)）が家督を相続し、春日山(かすがやま)城に入城している。1555年（弘治1）には、毛利元就(もとなり)が安芸国の厳島で陶晴賢(すえはるかた)の大軍を破り、大内氏の旧領を併合して戦国大名としての地位を確立した。なお、1543年（天文12）にはポルトガル商人が種子島に漂着して鉄砲が伝来した（1542年伝来説もある）。◇「てんもん」とも読む。