was a prominent 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...

 in 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...

 during the late 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....

. He is also known by his gō

Japanese name

in modern times usually consist of a family name , followed by a given name. "Middle names" are not generally used.Japanese names are usually written in kanji, which are characters of usually Chinese origin in Japanese pronunciation...

. As the 15th head of the Tosa Domain

Tosa Domain

The was a feudal domain in Tosa Province of Japan during the Edo period. Its official name is . Some from the domain played important roles in events in the late Tokugawa shogunate...

 of the Shikoku region, he conducted reforms along with Yoshida Toyo. At the Ansei Purge

Ansei Purge

The Ansei Purge was a purge, in 1858 and 1859, of over 100 people from the bakufu, various han, and the Japanese Imperial court...

 he was put on probation and later retirement. In 1862 he was appointed . In 1867 he advised Shogun Tokugawa Yoshinobu

Tokugawa Yoshinobu

was the 15th and last shogun of the Tokugawa shogunate of Japan. He was part of a movement which aimed to reform the aging shogunate, but was ultimately unsuccessful...

 to carry out Taisei Houkan (the return of power to the Emperor).