was the 5th daimyō

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...

 of Odawara Domain

Odawara Domain

was a Japanese domain of the Edo period, located in western Sagami Province. It was centered on Odawara Castle in what is now the city of Odawara.-History:...

 in Sagami Province

Sagami Province

was an old province in the area that is today the central and western Kanagawa prefecture. It was sometimes called . Sagami bordered on Izu, Musashi, Suruga provinces; and had access to the Pacific Ocean through Sagami Bay...

 (modern-day Kanagawa Prefecture

Kanagawa Prefecture

is a prefecture located in the southern Kantō region of Japan. The capital is Yokohama. Kanagawa is part of the Greater Tokyo Area.-History:The prefecture has some archaeological sites going back to the Jōmon period...

) in mid-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....

 Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

. His courtesy title was Kaga no Kami.

Biography

Ōkubo Tadayoshi was the eldest son of Ōkubo Tadaoki

Ōkubo Tadaoki

was the 4th daimyō of Odawara Domain in Sagami Province, in mid-Edo period Japan. His courtesy title was Dewa no Kami.-Biography:...

, the 4th daimyō of Odawara, and was born at Odawara Castle

Odawara Castle

is a landmark in the city of Odawara in Kanagawa Prefecture, Japan.-History:Odawara was a stronghold of the Doi clan during the Kamakura period, and a fortified residence was built by their collateral branch, the Kobayakawa clan stood on the approximate site of the present castle...

. He became Ōkubo clan

Okubo clan

The were a samurai kin group which rose to prominence in the Sengoku period and the Edo periods. Under the Tokugawa shogunate, the Ōkubo, as hereditary vassels of the Tokugawa clan, were classified as one of the fudai daimyō clans....

 leader and daimyō of Odawara on the retirement of his father on September 10, 1763. The implementation of further austerity measures in May 1764 in addition to those levied by his father indicates the continuing deterioration of the domain’s financial situation. Tadayoshi had a weak constitution from childhood, and died only 6 years after becoming daimyō on October 1, 1769 at the age of 34. His grave is at the clan temple of Saisho-ji in Setagaya, Tokyo

Setagaya, Tokyo

is one of the 23 special wards of Tokyo in Japan. It is also the name of a neighborhood within the ward. The ward calls itself the City of Setagaya in English...

.

Takayoshi was married to a daughter of Sakakibara Masamine, daimyō of Himeji Domain

Himeji Domain

The ' was a Japanese domain of the Edo Period, located in Harima Province .-List of lords:*Ikeda clan #Terumasa#Toshitaka#Mitsumasa*Honda clan #Tadamasa#Masatomo#Masakatsu...

 in Harima Province

Harima Province

or Banshu was a province of Japan in the part of Honshū that is the southwestern part of present-day Hyōgo Prefecture. Harima bordered on Tajima, Tamba, Settsu, Bizen, and Mimasaka Provinces. Its capital was Himeji....

.