Born the fifth son of Kinoshita Iesada. Through his mother he was tied to Hideyoshi's wife Nene, and as a child became Hideyoshi's adopted son. Childhood name Tatsunosuke; later Hashiba Hideatoshi.
He served near Hideyoshi at Jurakudai and Osaka Castle, raised as a Toyotomi kin. Being the hegemon's adopted son brought both glory and heavy pressure.
By Hideyoshi's order he became Takakage's adopted son and took the name Kobayakawa Hideaki. Takakage was famed as a wise general; Hideaki, still in his early teens, stood to inherit a great house.
After Takakage retired he inherited Chikuzen and other northern Kyushu lands. Retainers backed the young head as he began life as a daimyo under Hideyoshi.
He took part in the Keicho invasion of Korea. Tradition says Hideyoshi was displeased with his conduct, and he faced harsh treatment including a temporary transfer of lands.
When Hideyoshi died, power headed toward conflict between Tokugawa Ieyasu and Ishida Mitsunari. Hideaki had to choose sides; opinion in his house split.
As Ieyasu-Mitsunari conflict deepened, Hideaki showed Western leanings yet withheld a final choice. Until just before Sekigahara his side was unclear; both armies courted him.
At Sekigahara, listed with the West, he watched the tide then defected to the East and attacked Otani Yoshitsugu and others. A major factor in Eastern victory, he received 500,000 koku in Bizen and Mimasaka.
He began ruling from Okayama Castle. But the burden of vast rank at a young age and public judgment of his defection weighed heavily.
He died of illness in Okayama at twenty-one. Without an heir the Kobayakawa house was abolished. A short life of the young general who decided Sekigahara.
Kobayakawa TakakageToyotomi HideyoshiTokugawa IeyasuIshida MitsunariŌtani YoshitsuguKuroda Nagamasa
Tachibana MuneshigeKuroda NagamasaYodo-donoItō MancioHasekura TsunenagaUkita HideieYuki HideyasuToyotomi Hideyori
People of the Sengoku/Azuchi-Momoyama period ・ People by period
Based on facts found in textbooks and biographies. Uncertain points are marked as such.