Kōan (Kamakura period)

Change of era

• 1278 Kōan gannen: The new era name was created to mark an event or a number of events. The previous era ended and a new one commenced in Kenji 4.

  Events of the ''Kōan'' era

• August 15, 1281 : Battle of Kōan -- The second Mongol invasion of Japan is foiled, as a large typhoon - famously called a kamikaze, or divine wind - destroys much of the combined Chinese and Korean fleet and forces, numbering over 140,000 men and 4,000 ships.
• November 27, 1287 : In the 14th year of Go-Uda-tennō 's reign, the emperor abdicated; and the succession was received by his cousin. Shortly thereafter, Emperor Fushimi is said to have acceded to the throne.