The Battle of Idano (井田野合戦) was a battle during the Sengoku period (16th century) of Japan. The battle took place seven days after the murder of Matsudaira leader Kiyoyasu (grandfather of Tokugawa Ieyasu) at the hands of his vassal Abe Masatoyo.^[1]

Battle of Idano
Part of Sengoku period
Date December 5, 1535 (1535-12-05) Location Mikawa province 34°58′43.547″N 137°10′2.064″E / 34.97876306°N 137.16724000°E / 34.97876306; 137.16724000 Result Matsudaira victory
Belligerents
Matsudaira forces	Abe Masatoyo forces
Commanders and leaders
Matsudaira Nobutaka Matsudaira Yasutaka	Abe Masatoyo
class=notpageimage| Location within Japan

The forces of Matsudaira set out to take revenge against the rebel Masatoyo and his army, and were victorious.