Japan campaign
Part of Pacific War

Task Force 38, of the U.S. Third Fleet maneuvering off the coast of Japan, 17 August 1945, two days after Japan agreed to surrender.
Date18 April 1942[1] – 1 September 1945[2]
Mainland and Japan Islands, Pacific

Allied Victory


 United States
 United Kingdom
 New Zealand

 Soviet Union (from August 1945)
Empire of Japan Japan
Commanders and leaders

Franklin D. Roosevelt #
Harry S. Truman
United States Douglas MacArthur
United States William Halsey Jr.
United States Curtis LeMay
United States Chester W. Nimitz
United Kingdom Bernard Rawlings

Soviet Union Aleksandr Vasilevsky

Empire of Japan Hideki Tojo
Empire of Japan Shunroku Hata
Empire of Japan Kiichiro Higuchi
Empire of Japan Tadamichi Kuribayashi 
Empire of Japan Mitsuru Ushijima 
Empire of Japan Matome Ugaki 

Empire of Japan Seiichi Itō 
Casualties and losses
Comparatively light 193,300 soldiers dead (all causes)[3]
Surrendered and captured following blockade and bombings:
4,335,000 soldiers[4]
9,435 artillery pieces
5,286 tanks
731 other AFVs
12,682 aircraft (mostly kamikazes)[5]

The Japan campaign was a series of battles and engagements in and around the Japanese home islands, between Allied forces and the forces of Imperial Japan during the last stages of the Pacific campaign of World War II. The Japan campaign lasted from around June 1944 to August 1945.

Air war

Periodic air raids on Japan were the first attacks undertaken by Allied forces. In late 1944, these raids were followed by a major strategic bombing of cities, factories, and other war infrastructure throughout Japan, most notably:

The air raids resulted in heavy damage to Japanese infrastructure and the deaths of 241,000–900,000 Japanese citizens (mostly civilians), as well as the loss thousands of aircraft and flak guns. The Allies, in turn, only lost a few hundred aircraft (mostly bombers) to Japanese anti-air defenses and fighters.

Land and sea battles

In early 1945, there were two major island battles:

There were also two naval battles:

Allied warships also bombarded several Japanese cities during July and August 1945.

The battles of Iwo Jima and Okinawa foretold what was to be expected when the Japanese Home Islands were attacked. Iwo Jima and Okinawa were lost only after extremely fierce resistance was overcome. In both cases, the Japanese refused to surrender and there were few survivors. While Japanese losses were extremely high, Allied forces paid dearly to take both islands.

Naval operations included a suicidal Japanese counteroffensive on 7 April 1945 (Operation Ten-Go), to relieve Okinawa and an Allied campaign to place air and submarine-delivered mines in Japanese shipping lanes. This was illustrated by the naval surface interdiction of Tokyo Bay in July 1945.

In late 1945, the Soviet Union launched a series of successful invasions of northern Japanese territories, in preparation for the possible invasion of Hokkaido:

The end

Tokyo from the air after the firebombing of Tokyo, 1945.

World War II ended with the surrender of Japan after the atomic bombings of Hiroshima and Nagasaki. Before those two attacks, Japan was unwilling to surrender. The firebombing of Japanese cities resulted in 350,000 civilian deaths but did not move the government towards surrender. The Japanese government was clearly prepared to fight an Allied invasion of the home islands as fiercely as they had defended Iwo Jima and fought on the Japanese home island of Okinawa.

The Japan campaign was intended to provide staging areas and preparation for a possible Allied invasion of Japan and to support Allied air and naval campaigns against the Japanese mainland. Japan still had a homeland army of about two million soldiers and sufficient resources to cripple an Allied invasion. Consequently, had that invasion been necessary, it most likely would have resulted in a much higher death toll for both sides.[citation needed]

See also


  1. ^ The date of Double Strike, which is the beginning of Mainland Air Strike.
  2. ^ The Archipelago Landing Operation is over.
  3. ^ "Figures were compiled by the Relief Bureau of the Ministry of Health and Welfare in March 1964". Australia-Japan Research Project. Archived from the original on 11 March 2016. Retrieved 10 March 2016.. Combined death tolls of "Japan proper" (103,900) and Okinawa (89,400).
  4. ^ Ministry of Health and Welfare, 1964. Archived 2016-01-05 at the Wayback Machine
  5. ^ Final report: progress of demobilization of the Japanese Armed Forces, 30 December 1946 Part 2, Supreme Command of the Allied Powers, p. 49, archived from the original on 4 March 2016, retrieved 26 December 2015. Artillery is defined as being at least over 80 mm in caliber.