| Dates are from the Isawa Calendar | |
| Centuries: | 8th century - 9th century - 10th century |
| Years: | 836 837 838 - 839 - 840 841 842 |
Events[]
- Agasha Daijoku discovers a lost scroll written by Agasha and deciphers the Nazo Bubun no Agasha.
- Asako Hideyoshi transforms White Phoenix Castle in a modern castle with a three-storied tower, known as Shiro Asako.