Isamu Mochizuki was an officer and ace

Ace

An ace is a playing card. In the standard French deck, an ace has a single suit symbol located in the middle of the card, sometimes large and decorated, especially in the case of the Ace of Spades...

 fighter

Fighter aircraft

A fighter aircraft is a military aircraft designed primarily for air-to-air combat with other aircraft, as opposed to a bomber, which is designed primarily to attack ground targets...

 pilot in the Imperial Japanese Navy

Imperial Japanese Navy

The Imperial Japanese Navy was the navy of the Empire of Japan from 1869 until 1947, when it was dissolved following Japan's constitutional renunciation of the use of force as a means of settling international disputes...

 (IJN) during the Second Sino-Japanese War

Second Sino-Japanese War

The Second Sino-Japanese War was a military conflict fought primarily between the Republic of China and the Empire of Japan. From 1937 to 1941, China fought Japan with some economic help from Germany , the Soviet Union and the United States...

 and the Pacific theater

Pacific War

The Pacific War, also sometimes called the Asia-Pacific War refers broadly to the parts of World War II that took place in the Pacific Ocean, its islands, and in East Asia, then called the Far East...

 of World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

. In aerial combat over China and the Pacific, he was officially credited with destroying seven enemy aircraft. During his flying career, Mochizuki invented the half loop and roll technique used in dogfighting by Japanese fighter pilots. He was stranded on Roi-Namur

Roi-Namur

Roi-Namur is an island in the northern part of the Kwajalein atoll in the Marshall Islands.Occupied by Japanese forces prior to World War II, it was the target of the U.S. 4th Marine Division in the Battle of Kwajalein, in February 1944....

Island with no aircraft to fly after the American invasion on 6 February 1944. Mochizuki disappeared and was presumed killed in action in ground combat with the enemy.