Early career Born in the Tsuruoka domain,
Dewa Province (present day
Tsuruoka city,
Yamagata prefecture), Satō graduated from the 14th class of the
Imperial Japanese Naval Academy in 1887, ranked 5th of 45 cadets. He served as
midshipman on the
corvette ,
cruiser and corvette . On being commissioned an
ensign, he was assigned to the
gunboat , becoming chief navigator by 1890. After his promotion to
lieutenant in 1892, he served as chief navigator aboard the
gunboat .
First Sino-Japanese War At the time of the
First Sino-Japanese War, Sato was still assigned to
Akagi. He took command of the vessel when its captain was killed during the
Battle of the Yalu on 17 September 1894. Satō himself was wounded in the battle. Afterwards, he served as chief navigator on
Naniwa. On the conclusion of the war, Satō's talents and heroism were awarded with an assignment to the staff of Admiral
Yamamoto Gonnohyōe within the
Navy Ministry's Naval Affairs Department. Satō was sent to study naval strategy in the
United Kingdom from 1899–1901 and in the
United States from 1901 - 1902. Upon his return to Japan, he published
On the Defense of the Empire while an instructor at the
Naval War College, which advocated the Navy as the main force of national security and military strength. He was also appointed
executive officer of the cruiser
Miyako. After his promotion to
commander in 1902, he was
executive officer on and .
Russo-Japanese War During the
Russo-Japanese War, Satō served as a staff officer of the
IJN 2nd Fleet under Vice Admiral
Kamimura Hikonojō, partly to protect him from political retaliation by the
Imperial Japanese Army, who were incensed by his thesis that the navy was of more importance. While aboard the 2nd Fleet
flagship Izumo, Sato took part in the
Battle off Ulsan and the
Battle of Tsushima. Following the war, Satō was
executive officer on the
battleship , and was then given his first command: the gunboat ; however, he returned within a year to the Naval War College as an advanced student, and later served as an instructor from 1906 to 1908.
Naval theorist After winning promotion to
captain in 1907, Satō published several revised editions and expanded on his initial 1903 thesis including
History of Naval Defense (1907), ''History of the Empire's Defense
(1908), and the Revised History of the Empire's Defense'' (1912). Satō has been called "the
Mahan of Japan", as his writings emphasized that the key to Japan's safety was denial of
power projection by
hypothetical enemies (such as the
United States), into waters adjacent to the
Japanese home islands. Satō's works, along with documents of the Navy Ministry regarding policy, would form the basis of the Japanese naval expansion into the
Netherlands East Indies, using elements from naval plans developed by
United States Navy Admiral
Alfred T. Mahan and
Royal Navy Vice Admiral
Philip Howard Colomb. He also began urging the Japanese government to maintain at least a 70% capital ship level over the United States, Japan's hypothetical rival. Satō was promoted to
rear admiral in 1912, while at the Navy War College, as well as serving at sea between 1908 until 1914 as captain of the and . The following year after Japan's entry into
World War I, Satō was appointed
Vice Chief of the Navy General Staff in 1915, and promoted to
vice admiral the next year while serving as president of the Navy War College. Leaving the Navy War College in 1920, Satō commanded the
Maizuru Naval District before being placed on the inactive list in 1922. In November 1928, he was awarded the
Order of the Sacred Treasure (1st class). Named to the
House of Peers in 1934, Satō was a major opponent to Japan's participation in the
Washington Naval Treaty (and thus a member of the
Fleet Faction following World War I until his death in 1942.) ==References==