Yamaguchi Motomi (山口素臣, Yamaguchi Motomi, June 8, 1846 – August 7, 1904) was a Japanese Samurai and an Imperial Japanese Army general who participated in the First Sino-Japanese War and the Boxer Rebellion.

In January of the following year, when the First Regiment of the Konoye Infantry was established, he became the first battalion chief and participated in the Saga Rebellion.

Upon the outbreak of the First Sino-Japanese War, he became the 3rd Brigade Chief of the 2nd Division Subordinate Infantry.

When Yamaguchi visited the field hospital, he held a soldier's hand, stroked his back, and scolded him, "What should I do if the sickness takes my life to throw away for the nation?

"[4] Due to his victory and achievement in Weihaiwei, he was awarded to be a baron in August 1895 after the war, and in October 1896, he advanced to Lieutenant General of the Army and was supplemented by the 5th Division Commander.

In March 1904, he was promoted to General of the Army and appointed the military councilor officer before his death in August of the same year.