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 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 Hiroshima Domain

Hiroshima Domain

Hiroshima Domain was a han, or feudal domain, of Edo period Japan. Based at Hiroshima castle in the city of Hiroshima, the domain encompassed Aki province and parts of neighboring Bingo province....

. He held the title of Aki no kami.

During the 47 Ronin incident, Tsunanaga sent a messenger to Akō, which was ruled by a branch family of the Hiroshima Asano, and recommended that Ōishi Kuranosuke peacefully surrender the castle to the shogunate's envoys.

His daughter married the court noble Ichijō Kaneka

Ichijo Kaneka

, son of regent Takatsukasa Fusasuke and adopted son of regent Kaneteru, was a kugyō of the Edo period of Japan. He held a regent position kampaku from 1737 to 1746. He married a daughter of Asano Tsunanaga, fourth head of Hiroshima Domain, and an adopted daughter of Ikeda Tsunamasa, second head...

.