The Tengyō no Ran (天慶の乱) ("War in the Tengyō era" or "Tengyō Disturbance"), or Jōhei Tengyō no Ran refers to the name of a brief medieval Japanese conflict, in which Taira no Masakado rebelled against the central government. He was defeated after 59 days of fighting with the imperial forces led by Fujiwara Hidesato and Taira Sadamori, who was Masakado's kinsman. One of the legends created about the conflict described how Masakado, fearing Hidesato's archery skills, employed doppelganger bodyguards to protect himself. The warrior-rebel was beheaded on 25 March 940 CE during the Battle of Kojima.
- Reider, Noriko (30 September 2010). Japanese Demon Lore: Oni from Ancient Times to the Present. University Press of Colorado. ISBN 9780874217940.
- Frédéric, Louis (2002). Japan Encyclopedia. Translated by Roth, Kathe. Cambridge, MA: Harvard University Press. p. 926. ISBN 0674007700.
- Friday, Karl (2008). The First Samurai: The Life and Legend of the Warrior Rebel, Taira Masakado. Hoboken, NJ: John Wiley & Sons. p. 1. ISBN 9780471760825.
- Poole, Scott (15 August 2017). Yorkshire Rider Buses. Amberley Publishing. ISBN 9781445669052.