was a after Chōgen and before Chōkyū. This period spanned the years from April 1037 through 1040. The reigning emperor was .
was a after Chōgen and before Chōkyū. This period spanned the years from April 1037 through 1040. The reigning emperor was .
==Change of era== 1037 : The new era name was created to mark an event or series of events. The previous era ended and the new one commenced in Chōgen 10, on the 21st day of the 4th month of 1037.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).