The battle of Sendanno was a battle during the Sengoku period (16th century) of Japan, one of many fought by daimyōs (feudal lords) who sought to suppress the anti-samurai uprisings of the Ikkō-ikki.
The Ikki were mobs of peasants, commoners, monks, and low-ranking samurai who revolted out of a desire to improve their social standing by threatening to overthrow the daimyo.
In December 1536, Nagao Tamekage set out from the castle of Kasugayama to fight against the Ikkō-ikki of Kaga Province.
They met in battle at a place called Sendanno, in Etchū Province.
There, Tamekage was defeated and killed, along with many other Nagao clan warriors.