Chōgen

Change of era

• 1028 Chōgen gannen: The new era name Chōgen was created to mark and event or series of events. The previous era ended and the new one commenced in Manju 5, on the 25th day of the 7th month.

  Events of the ''Chōgen'' era

• Chōgen 9, on the 17th day of the 4th month : In the 9th year of Emperor Go-Ichijō's reign, he died; and the succession was received by his son.
• Chōgen 9, in the 7th month : Emperor Go-Suzaku is said to have acceded to the throne.