Isamu Sonoyama (園山 勇, Sonoyama Isamu, April 6, 1848 – August 14, 1921) was a Japanese politician.
He was born in Shimane Prefecture.
He served in the House of Representatives of the Empire of Japan.
He was governor of Nagano Prefecture (1898-1899) and Miyazaki Prefecture (1899-1902).
This article about a Japanese politician is a stub.