was a samurai of the Sengoku

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...

 through early Edo period

Edo period

The , or , is a division of Japanese history which was ruled by the shoguns of the Tokugawa family, running from 1603 to 1868. The political entity of this period was the Tokugawa shogunate....

s. His family name means "under the tree." He was the brother-in -law of the general who would become known as Toyotomi Hideyoshi

Toyotomi Hideyoshi

was a daimyo warrior, general and politician of the Sengoku period. He unified the political factions of Japan. He succeeded his former liege lord, Oda Nobunaga, and brought an end to the Sengoku period. The period of his rule is often called the Momoyama period, named after Hideyoshi's castle...

.

At the time of the Battle of Sekigahara

Battle of Sekigahara

The , popularly known as the , was a decisive battle on October 21, 1600 which cleared the path to the Shogunate for Tokugawa Ieyasu...

, Iesada was lord of Himeji han and held 25,000 koku of income. However, due to his distinction in guarding his sister O-ne

Nene (person)

or One was an aristocratic lady during the Sengoku and Edo periods of Japanese history known for her intelligence and marriage to Toyotomi Hideyoshi...

 (Hideyoshi's wife), Tokugawa Ieyasu

Tokugawa Ieyasu

 was the founder and first shogun of the Tokugawa shogunate of Japan , which ruled from the Battle of Sekigahara  in 1600 until the Meiji Restoration in 1868. Ieyasu seized power in 1600, received appointment as shogun in 1603, abdicated from office in 1605, but...

 rewarded him, and he was enfeifed at Ashimori han in Bitchu Province

Bitchu Province

was a province of Japan on the Inland Sea side of western Honshū, in what is today western Okayama Prefecture. It was sometimes called , with Bizen and Bingo Provinces. Bitchu bordered Hōki, Mimasaka, Bizen, and Bingo Provinces....

 following the battle.

Iesada's children included Katsutoshi, Toshifusa, Nobutoshi, Toshisada, and Hidenori

Kobayakawa Hideaki

Kobayakawa Hideaki was fifth son of Kinoshita Iesada and the nephew of Toyotomi Hideyoshi.He was adopted by Hideyoshi and called himself Hashiba Hidetoshi and Shusen . He was then again adopted by Kobayakawa Takakage and renamed himself Hideaki...

. Toshifusa, his 2nd son, succeeded him.