, also known as Ikeda Nobuteru (池田 信輝), was an Ikeda clan daimyō and military commander under Oda Nobunaga during the Sengoku period and Azuchi–Momoyama periods of 16th-century Japan. He was a retainer of the famous warlords Oda Nobunaga and Toyotomi Hideyoshi. In his early years, he served Nobunaga since his mother was Nobunaga's foster mother.
Early life
His childhood name is unknown and his common name was Katsuzaburō (勝三郎). His father was Ikeda Tsunetoshi, who served Oda Nobuhide. His mother, Yōtokuin (養徳院), was Oda Nobunaga's wet nurse, and later became Nobuhide's concubine, bearing him a daughter. There are various theories as to his birthplace (including the Owari, Mino, Settsu and Ōmi provinces). He was one of the four karō at Kiyosu Castle. His official position was Kii-no-kami (紀伊守), or "Governor of Kii Province". His courtesy name was Shōzaburō (勝三郎). He later became a priest and referred to himself as Shōnyū (勝入).
Military life
In 1552 - 1554, He took part in the Battle of Kiyosu Castle against Oda Nobutomo, deputy governor of southern Owari.
In 1556, he defeated Oda Nobuyuki, who was guilty of treason against his brother Oda Nobunaga. In 1558, he took over Suemori Castle.
In 1560, he led one of Nobunaga's main forces against Imagawa Yoshimoto at the Battle of Okehazama.
In 1567, he participated in the Siege of Inabayama Castle against the Saitō clan in the first division of Oda Nobunaga's forces, along with Shibata Katsuie.
In 1570, he was active in the Battle of Anegawa against the Azai-Asakura alliance and became the lord of Inuyama Castle.
In 1571, Tsuneoki took part in the burning Siege of Mount Hiei to subdue the followers of the Ishiyama-Honganji; attacks against the Nagashima Ikkō-ikki.
In 1573, he participated in the Siege of Makishima Castle against Ashikaga Yoshiaki. Yoshiaki surrendered, and sending Yoshihiro, his eldest son, as a hostage to Nobunaga.
In 1574, he entered the mountain fortress of Ori Castle in eastern Mino to pin-down Akechi Castle after it was taken by Takeda Katsuyori.
In 1575, he fought in the Battle of Nagashino against the Takeda clan.
In 1577, he took part in the Battle of Tedorigawa against the Uesugi clan.
In 1580, he beat Araki Murashige at Siege of Hanakuma Castle, who locked himself in the castle and was given Murashige's domain at Settsu Province.
In 1582, he led 4000 troops, acted as the spearhead in the right wing, and became the chief vassal of Oda family in Hashiba Hideyoshi's force at the Battle of Yamazaki after the Incident at Honnō-ji, helping defeat Akechi Mitsuhide.