The council of five elders, also known as the five Tairō (五大老 go-tairō), was formed by 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...

 to rule Japan in the place of his son, Hideyori

Toyotomi Hideyori

was the son and designated successor of Toyotomi Hideyoshi, the general who first united all of Japan. His mother, Yodo-dono, was the niece of Oda Nobunaga....

, until such time as he came of age. Hideyoshi chose his five most powerful daimyo

Daimyo

is a generic term referring to the powerful territorial lords in pre-modern Japan who ruled most of the country from their vast, hereditary land holdings...

: Ukita Hideie

Ukita Hideie

was the daimyo of Bizen and Mimasaka provinces , and one of the council of Five Elders appointed by Toyotomi Hideyoshi. Son of Ukita Naoie, he married Gohime, a daughter of Maeda Toshiie...

, Maeda Toshiie

Maeda Toshiie

was one of the leading generals of Oda Nobunaga following the Sengoku period of the 16th century extending to the Azuchi-Momoyama period. His father was Maeda Toshimasa. He was the fourth of seven brothers. His childhood name was "Inuchiyo" . His preferred weapon was a yari and he was known as...

, Uesugi Kagekatsu

Uesugi Kagekatsu

was a daimyo during the Sengoku and Edo periods of Japanese history. The son of Nagao Masakage and husband of Uesugi Kenshin's elder sister, Aya-Gozen. After his father died, he was adopted by Kenshin....

, Mōri Terumoto, and the famous 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...

. (Kobayakawa Takakage

Kobayakawa Takakage

was a samurai retainer of Toyotomi Hideyoshi during Japan's Sengoku period, and the son of Mōri Motonari. Adopted by the head of the Kobayakawa clan, Takakage took his name, and succeeded his adoptive father to become head of the Kobayakawa clan following his death in 1545.As head of the Kobayakawa...

 was also to have been one of the elders, but died before Hideyoshi himself.)

It was Hideyoshi's hope that the members of the council would balance each other, preventing any one of them from taking control. This was not to be, however: almost immediately after Hideyoshi's death in 1598, the elders swiftly divided themselves into two camps, consisting of 'Tokugawa' and 'everybody else'. War did not actually break out until mid-1600; it ended the same year, at 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...

, where Tokugawa won a decisive victory. Hideyori was sidelined, retaining control of Osaka Castle

Osaka Castle

is a Japanese castle in Chūō-ku, Osaka, Japan.Originally called Ozakajō, it is one of Japan's most famous castles, and played a major role in the unification of Japan during the sixteenth century of the Azuchi-Momoyama period.-Description:...

, but was attacked and defeated by Tokugawa in the Siege of Osaka

Siege of Osaka

The was a series of battles undertaken by the Tokugawa shogunate against the Toyotomi clan, and ending in that clan's destruction. Divided into two stages , and lasting from 1614 to 1615, the siege put an end to the last major armed opposition to the shogunate's establishment...

 and committed seppuku

Seppuku

is a form of Japanese ritual suicide by disembowelment. Seppuku was originally reserved only for samurai. Part of the samurai bushido honor code, seppuku was either used voluntarily by samurai to die with honor rather than fall into the hands of their enemies , or as a form of capital punishment...

in 1615.