Tatsuo Matsumura

was a Japanese admiral who was Commander of the Interim Southern Islands Defense Unit from 1914 to 1915.

Biography Matsumura was born in what is now Saga Prefecture where his father was a samurai and lieutenant commander in the navy of Saga Domain. He was a graduate of the 14th class of the Imperial Japanese Naval Academy in 1887. One of his classmates was the future Prime Minister Suzuki Kantarō. He was commissioned as a lieutenant in December 1892, serving as navigator on the barque training ship Kanju and later the . During the First Sino-Japanese War, he served in staff positions and did not see combat, returning to sea after the end of the war as navigator on the ironclad in 1896. The following year, he graduated with honors from the first class of the Naval War College and was promoted to lieutenant commander. He was promoted to commander in October 1902.