Tenmon 9 (天文九年)
Timeline of 1540
- 1540/8 Amako Akihisa unsuccesfully attempts to capture Môri Motonari's Koriyama castle in Aki province through siege.
Other Events of 1540
- The first Ôuchi clan tribute mission to be sent to China since the 1523 Ningbo Incident arrives in China after being sent two years earlier.
- The Society of Jesus (the Jesuit Order) is established.