Ōkubo Tadachika

Ōkubo Tadachika
大久保 忠隣
Daimyō of Odawara Domain
In office
1594–1614
Preceded byŌkubo Tadayo
Succeeded byAbe Masatsugu
Personal details
Bornc.1553 (1553)
Okazaki, Feudal Japan
DiedJuly 28, 1628(1628-07-28) (aged 74–75)
Edo, Japan
Parent
OccupationRōjū
Military service
AllegianceTokugawa clan
RankKarō, Daimyo
UnitOkubo clan
CommandsOdawara castle
Battles/warsSiege of Horikawa Castle
Battle of Anegawa (1570)
Battle of Mikatagahara (1573)
Battle of Nagashino (1575)
Journey in Iga
Battle of Komaki and Nagakute (1584)
Siege of Odawara (1590)
Siege of Ueda (1600)

Ōkubo Tadachika (大久保 忠隣; 1553 July 28, 1628), or also known as Ōkubo Nagayasu (大久保 長安), was daimyō of Odawara Domain in Sagami Province in early Edo period, Japan. Ōkubo Tadachika was the son of Ōkubo Tadayo, a Fudai daimyō hereditary vassal to the Tokugawa clan in what is now part of the city of Okazaki, Aichi.

He entered into service as a samurai from age 11, and took his first head in battle at the age of 16. Ōkubo Tadachika appointed as Rōjū After the establishment of Tokugawa shogunate. He came to be regarded as one of Ieyasu's most experienced and trusted advisors, along with Honda Masanobu.

He was most known in history for his political career's demise due to the "Ōkubo clan's incidents", which caused him stripped from most of his domains control and exiled by the Shogunate.

He also known for his work of Mikawa Monogatari chronicle, which recorded the history of Tokugawa Ieyasu's rise to power and the early Tokugawa shogunate.