was a Japanese 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...

 of 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....

, who ruled the Takamatsu Domain

Takamatsu Domain

The was a han or feudal domain in Sanuki Province , Japan during the Edo period. The domain was governed first by the Ikoma family then by the Mito-Matsudaira clan.-History:...

. Yoritoshi was the son-in-law

Son-in-Law

Son-in-Law was a British Thoroughbred racehorse and an influential sire, especially for sport horses.The National Horseracing Museum says that Son-in-Law is "probably the best and most distinguished stayer this country has ever known." Described as "one of the principal influences for stamina in...

 of Ii Naosuke

Ii Naosuke

was daimyo of Hikone and also Tairō of Tokugawa Shogunate, Japan, a position he held from April 23, 1858 until his death on March 24, 1860. He is most famous for signing the Harris Treaty with the United States, granting access to ports for trade to American merchants and seamen and...

. His court title was Sanuki no kami. Yoritoshi was adopted as heir to Matsudaira Yoritane, the incumbent lord of Takamatsu, in 1853, and succeeded Yoritane as lord in 1861. Under his leadership, Takamatsu forces supported the security operations of the Tokugawa Shogunate

Tokugawa shogunate

The Tokugawa shogunate, also known as the and the , was a feudal regime of Japan established by Tokugawa Ieyasu and ruled by the shoguns of the Tokugawa family. This period is known as the Edo period and gets its name from the capital city, Edo, which is now called Tokyo, after the name was...

 in the Kyoto area. During the Hamaguri Rebellion

Hamaguri rebellion

The rebellion at the Hamaguri Gate of the Imperial Palace in Kyōto took place on August 20, 1864 and reflected the discontent of pro-imperial and anti-alien groups...

, Takamatsu troops helped defend the imperial palace. His forces took part in the Battle of Toba-Fushimi

Battle of Toba-Fushimi

The occurred between pro-Imperial and Tokugawa shogunate forces during the Boshin War in Japan. The battle started on 27 January 1868 , when the forces of the Tokugawa shogunate and the allied forces of Chōshū, Satsuma and Tosa domains clashed near Fushimi...

, and in response, the imperial court stripped him of rank and title. Yoritoshi then put himself under domiciliary confinement, and had a senior retainer executed; this led to an imperial pardon.

Yoritoshi became a count (hakushaku) in the kazoku

Kazoku

The was the hereditary peerage of the Empire of Japan that existed between 1869 and 1947.-Origins:Following the Meiji Restoration of 1868, the ancient court nobility of Kyoto regained some of its lost status...

nobility in 1884, and died in 1903.