Isoroku Yamamoto

Isoroku Yamamoto, born Isoroku Takano on April 4, 1884, in Nagaoka, Niigata, served as an admiral in the Imperial Japanese Navy and commanded the Combined Fleet from 1939 until his death in 1943. He oversaw the Pacific War's beginning in 1941 and Japan's early victories and later setbacks. His life ended on April 18, 1943, when U.S. fighter aircraft shot down his plane over New Guinea.

His father, Sadayoshi Takano, was a mid-ranking samurai from the Nagaoka Domain. The name "Isoroku" means "56" in Japanese, reflecting his father's age at his birth. Isoroku was the sixth son and seventh child; his mother was Sadayoshi's third wife, and all three wives were sisters, with the first two dying young—a common practice for widowers to marry a deceased wife's younger sister. In 1916, he was adopted into the Yamamoto family, another former samurai household, to carry on their name, rank, and income. He married Reiko Mihashi in 1918, and they had two sons and two daughters.

Yamamoto graduated 11th in his class from the Imperial Naval Academy in 1904. During the Russo-Japanese War, he served as a signalman on the armored cruiser *Nisshin* and was wounded at the Battle of Tsushima. An explosion in the ship's forward turret—likely from the gun itself, not Russian fire—cost him his left hand's index and middle fingers and left a thigh wound "the size of a baby's head." He entered the Naval Staff College in 1914, became a lieutenant commander in 1916, and was promoted to commander in December 1919.

In the 1920s and 1930s, Yamamoto belonged to the Japanese Navy establishment, which rivaled the more aggressive Army, especially the Kwantung Army officers. He advocated for a strong fleet to project power through gunboat diplomacy, rather than one focused on transporting invasion forces, as his Army opponents wanted. This stance led him to oppose the invasion of China and war with the United States. His time at Harvard University (1919–1921) and two postings as naval attaché in Washington, D.C., gave him fluent English and a deep understanding of American customs and business. Promoted to captain in 1923, he visited the U.S. Naval War College on February 13, 1924, as part of a Japanese delegation. Later that year, he shifted his specialty from gunnery to naval aviation. His first command was the cruiser *Isuzu* in 1928, followed by the aircraft carrier *Akagi*.

As a rear admiral, he attended the 1930 London Naval Conference, and as a vice admiral, the 1935 conference, because growing military influence required a career specialist to accompany diplomats to arms limitation talks. A strong proponent of naval aviation, he headed the Aeronautics Department and later commanded the First Carrier Division. He opposed the 1931 invasion of northeast China, the full-scale war with China in 1937, and the 1940 Tripartite Pact with Nazi Germany and Fascist Italy. As Deputy Navy Minister, he apologized to U.S. Ambassador Joseph C. Grew for the December 1937 bombing of the gunboat USS *Panay*. These positions made him a target of assassination threats from pro-war militarists. Throughout 1938, many young army and naval officers publicly criticized Yamamoto and admirals like Mitsumasa Yonai and Shigeyoshi Inoue for opposing the pact, which they saw as harmful to Japan's interests. Yamamoto received constant hate mail and death threats from nationalists but accepted the possibility of assassination passively.

His experiences convinced him that naval power relied on oil and industrial capacity, making a Japanese victory over the U.S. unlikely. He was among the first naval leaders to conclude that naval aviation and aircraft carriers would decide future conflicts. In 1936, he became navy vice minister and opposed the Tripartite Pact. Appointed commander-in-chief of the Combined Fleet in 1939, he was tasked with planning a war strategy against the U.S. He favored a surprise attack, executed at Pearl Harbor in December 1941. Early in the war, the Japanese fleet won several decisive victories, but these gains halted at the Battle of Midway in June 1942, where four Japanese carriers were sunk. Yamamoto committed to defending the Solomon Islands during the Guadalcanal campaign but could not prevent their capture. In April 1943, American code breakers intercepted his flight plans, allowing U.S. Army Air Forces to shoot down his aircraft.