The Battle of Inō was a battle fought during the Sengoku period

Sengoku period

The or Warring States period in Japanese history was a time of social upheaval, political intrigue, and nearly constant military conflict that lasted roughly from the middle of the 15th century to the beginning of the 17th century. The name "Sengoku" was adopted by Japanese historians in reference...

 (16th century) of Japan. The battle was fought between two forces of the Oda clan

Oda clan

The was a family of Japanese daimyo who were to become an important political force in the unification of Japan in the mid-16th century. Though they had the climax of their fame under Oda Nobunaga and fell from the spotlight soon after, several branches of the family would continue on as daimyo...

, the head of the clan Oda Nobunaga

Oda Nobunaga

was the initiator of the unification of Japan under the shogunate in the late 16th century, which ruled Japan until the Meiji Restoration in 1868. He was also a major daimyo during the Sengoku period of Japanese history. His opus was continued, completed and finalized by his successors Toyotomi...

 and his brother Oda Nobuyuki

Oda Nobuyuki

was the son of Oda Nobuhide, and younger brother of Oda Nobunaga in the earlier years of the Sengoku period of the 16th century of Japan.Nobuyuki conspired against his brother Nobunaga with the Hayashi and Shibata families. Nobuyuki's Suemori Castle was reduced by Ikeda Nobuteru. Though Hayashi and...

, who with the support of Shibata Katsuie

Shibata Katsuie

or was a Japanese military commander during the Sengoku Period who served Oda Nobunaga.-Biography:Katsuie was born in the Shibata family, a branch of the Shiba clan . Note the differences between , , and the .Katsuie was the retainer of Oda Nobukatsu...

 and Hayashi Hidesada

Hayashi Hidesada

was a Japanese samurai and retainer of Oda clan, who lived during the Sengoku period. He was also known as . His tsūshō was , and his court title was Sado no Kami.-Biography:...

, rebelled against Nobunaga. The three conspirators were defeated at the Battle of Inō, but they were pardoned after the intervention of Tsuchida Gozen

Tsuchida Gozen

was married to Oda Nobuhide and was the mother of Oda Nobunaga, a major feudal warlord in the Sengoku period of Japan. She was also the mother of three of his brothers, Nobuyuki, Nobukane and Hidetaka; and two of his sisters, Oinu and Oichi. It is assumed that she is the daughter of Tsuchida...

, the birth mother of both Nobunaga and Nobuyuki. The next year, however, Nobuyuki again planned to rebel. When Nobunaga was informed of this by Shibata Katsuie, he faked illness to get close to Nobuyuki and assassinated him in Kiyosu Castle

Kiyosu Castle

is a castle that acted as a base of operations for Oda Nobunaga during the latter half of the Sengoku period of feudal Japan. It is located in the city of Kiyosu, Aichi Prefecture, Japan....

.