Minoru Genda

General Minoru Genda (源田 実) was a Imperial Japanese Navy flight officer, JASDF general and politician.

He is best known for helping to plan the attack on Pearl Harbor.

After the war he became the third Chief of Staff of the Japan Air Self-Defense Force.

Minoru Genda was the second son of a farmer from Kake, Hiroshima Prefecture, north of the city of Hiroshima.

Two brothers were graduates of Imperial University of Tokyo (Tokyo University), another brother graduated from Chiba Medical College, and his youngest brother entered the Army Academy.

Genda graduated from the Imperial Japanese Naval Academy in 1924 and took flight training for 11 months in 1928–1929, graduating with honors to become a fighter pilot.

Genda was assigned to the aircraft carrier JAPANESE AIRCRAFT CARRIER Akagi in 1931.

He was well known in the navy, and in 1932 Genda formed a demonstration team at Yokosuka, leading a division of biplanes around the country, conducting aerobatic demonstrations.

Known as "Genda's Flying Circus", the team, consisting of Genda, Yoshita Kobayashi and Motoharu Okamura, using Nakajima A2N Type 90 fighters, was part of a public relations campaign to promote naval aviation.

Yamamoto had become acquainted with Genda in 1933 when he served aboard the carrier JAPANESE AIRCRAFT CARRIER Ryūjō.

Yamamoto initially conceived of a one-way attack on Pearl Harbor from 500 to 600 mi away.

In his scheme, returning aircraft would ditch in the ocean off Oahu and the pilots would be picked up by destroyers and submarines.

Yamamoto was focused on smashing the U.S. Pacific Fleet and sinking as many battleships as possible.

Conventional American and Japanese naval doctrine, reflecting the Mahan theory, held that battleships were the instrumental tool of naval supremacy, so it was believed that the destruction of several of these ships would shift the balance of naval power in Japan's favor.

Genda had previously considered an attack on Pearl Harbor in 1934 and had discussed the possibility then with Takijirō Onishi.

Genda emphasized to Yamamoto that "secrecy is the keynote and surprise the all-important factor."

Genda felt that the task was "difficult, but not impossible" and began working on the details of the plan.

Genda favored a three wave attack using six aircraft carriers for a successful air strike.

Genda was responsible for much of the training, especially in the new tactics of shallow-water torpedo use, effective use of level-bombing by tactical aircraft, and coordinating several aircraft carriers simultaneously.

He played a key role in persuading IJN leaders to name Mitsuo Fuchida, his classmate at the Japanese Naval Academy, as the leader of the air attack.

The surprise attack on Pearl Harbor resulted in the US declaring war on Japan, with 18 American warships sunk or damaged and over 180 American aircraft destroyed.

The main Japanese fleet suffered no ship losses and 29 aircraft lost (9 in the first wave and 20 in the second), losses that the Japanese considered acceptable.

But this surprise attack eventually led to disaster for Japan.

He gained combat experience with the Second Combined Air Group during the Second Sino-Japanese War and from the autumn of 1937, was senior flight instructor for the Yokosuka Air Group in 1938.

Most naval strategists and tacticians of the time conceived of single carriers launching raids on enemy targets, or sailing with a fleet to provide air cover against enemy bombers.

Genda understood the potential of massed air raids launched from multiple aircraft carriers steaming together.

An air power advocate from the time he attended the Japanese Naval Academy, Genda urged Japan's pre-war military leaders to stop building battleships (which he believed would be better used as "piers" or scrap iron) and concentrate on aircraft carriers, submarines, and supporting fast cruisers and destroyers.

Above all, Genda thought that a modern and large naval air fleet would be necessary for survival if Japan was ever to fight a war with the United States and the United Kingdom as well as their allies.

However, Genda's rank—captain—was too low to be of much strategic influence.

The Pearl Harbor attack plan was the brainchild of Japanese Admiral Isoroku Yamamoto.

Yamamoto ordered a number of officers to study Pearl Harbor and to draw up an operational plan.

Admiral Takijiro Onishi gathered together all the relevant facts that could be found about the area.

Once this was done, the attack plan itself was written primarily by Rear Admiral Ryunosuke Kusaka with assistance from Captain Genda and Deputy Chief of Staff, Captain Kameto Kuroshima.

In summer 1940 at the age of 36, Genda was chosen by the Japanese Naval Department to travel abroad as a military attaché to obtain first-hand military accounts of German air offensives and British defensive measures during the Battle of Britain.

His assessment of the Royal Air Force (RAF), Hawker Hurricane Mk I and Supermarine Spitfire Mk I fighters against the German Messerschmitt Bf 109E "Emil" later provided evidence that the Japanese Mitsubishi A6M Zero Model 21 could easily outmaneuver these Western European aircraft.

The carefully recorded details were secretly documented during his brief tour in London and were hand-carried by Genda during his return trip to Japan for naval department studies.

His official trip was in accord with British-Japanese naval accords authorizing official military attaché visits to the war front to observe and document military operations.

Genda's Western European trip provided added stimulus for Japanese strategic naval studies and exercises to discover weaknesses and formulate tactics that were later used against the U.S.

On his return to Japan, he was assigned to the First Carrier Division and met with Yamamoto in early February 1941, during which time Yamamoto presented some ideas for attacking the U.S. Pacific Fleet.

Genda warmed to his ideas.