|Dates are from the Isawa Calendar|
|Centuries:||5th century - 6th century - 7th century|
|Years:||517 518 519 - 520 - 521 522 523|
- Daidoji Daimyo Daidoji Kamei requests his brother Daidoji Hira to commit seppuku for his erratic behaviour. Hira flees with his followers to the Uebe Marshes.
- Daidoji Kasako becomes Daidoji Daimyo.
- Peasant revolts erupt in Crane and Scorpion lands to demand the Empire recognize the Heresy of the Five Rings.
- Foxfire War begins.