Hasegawa - who was born in Japan and has taught in the United States since 1990, and who reads English, Japanese, and Russian - rejects both the traditional and revisionist positions. According to his close examination of the evidence, Japan was not poised to surrender before Hiroshima, as the revisionists argued, nor was it ready to give in immediately after the atomic bomb, as traditionalists have always seen it. Instead, it took the Soviet declaration of war on Japan, several days after Hiroshima, to bring the capitulation.
Both the American and Japanese public have clung to the idea that the mushroom clouds ended the war. For the Japanese, Hiroshima is a potent symbol of their nation as victim, helping obscure their role as the aggressors and in atrocities that include mass rapes and beheading prisoners of war. For the Americans, Hiroshima has always been a means justified by the end.
“This seems to touch a nerve,” observes Hasegawa.
That may help explain why Hasegawa’s thesis, which he first detailed in an award-winning 2005 book and has continued to bolster with new material, is still little known outside of academic circles, says Ward Wilson, a nuclear weapons scholar who has drawn on Hasegawa’s insights in his own recent work. Measured against the decades of serious and settled thinking about World War II, Hasegawa’s scholarship feels radical. But another reason, Wilson argues, is that to look at history in this new light is to entertain what seem like shocking ideas. That the destruction of cities does not sway leaders. That what happened in Hiroshima and Nagasaki was not overly remarkable. And, strangest of all: That nuclear explosives may not be particularly effective weapons of war.
The Pacific War began in 1941 with the violent humiliation at Pearl Harbor. Japan already held parts of China, and quickly invaded New Guinea, the Dutch East Indies, Burma, and Singapore. Manila fell. The country enjoyed air supremacy across most of Southeast Asia; in February 1942, it even attacked Australia. Japan’s control was tightening, and it appeared unstoppable.
After the epic Battle of Midway in the summer of 1942, however, the United States and its allies gained the momentum. Still, progress was slow as Marines hopped from atoll to island to atoll: wading through bloody coral shallows under a rain of s ing, engaging an enemy that was dug in, highly trained, and willing to fight to the death. The names of these tropical s - Gaudalcanal, Iwo Jima, Okinawa - have become Marine Corps legend. The casualties were heavy.
By the summer of 1945, the Americans had cornered Japan and assembled a final invasion plan, codenamed Operation Downfall. The first stage was scheduled for the fall, and would have opened with the landing of more than 700,000 troops on Kyushu, the southernmost of the big four islands. It would have been a larger operation than D-Day, certain to result in a bloody slaughter.
Americans, then and today, have tended to assume that Japan’s leaders were simply blinded by their own fanaticism, forcing a catastrophic showdown for no reason other than their refusal to acknowledge defeat. This was, after all, a nation that trained its young men to fly their planes, freighted with explosives, into the side of American naval vessels.
But Hasegawa and other historians have shown that Japan’s leaders were in fact quite savvy, well aware of their difficult position, and holding out for strategic reasons. Their concern was not so much whether to end the conflict, but how to end it while holding onto territory, avoiding war crimes trials, and preserving the imperial system. The Japanese could still inflict heavy casualties on any invader, and they hoped to convince the Soviet Union, still neutral in the Asian theater, to mediate a settlement with the Americans. Stalin, they calculated, might negotiate more favorable terms in exchange for territory in Asia. It was a long shot, but it made strategic sense.
On Aug. 6, the American bomber Enola Gay dropped its payload on Hiroshima, leaving the signature mushroom cloud and devastation on the ground, including something on the order of 100,000 killed. (The figures remain disputed, and depend on how the fatalities are counted.)
As Hasegawa writes in his book “Racing the Enemy,” the Japanese leadership reacted with concern, but not panic. On Aug. 7, Foreign Minister Shigenori Togo sent an urgent coded telegram to his ambassador in Moscow, asking him to press for a response to the Japanese request for mediation, which the Soviets had yet to provide. The bombing added a “sense of urgency,” Hasegawa says, but the plan remained the same.
Very late the next night, however, something happened that did change the plan. The Soviet Union declared war and launched a broad surprise attack on Japanese forces in Manchuria. In that instant, Japan’s strategy was ruined. Stalin would not be extracting concessions from the Americans. And the approaching Red Army brought new concerns: The military position was more dire, and it was hard to imagine occupying communists allowing Japan’s traditional imperial system to continue. Better to surrender to Washington than to Moscow.
By the morning of Aug. 9, the Japanese Supreme War Council was meeting to discuss the terms of surrender. (During the meeting, the second atomic bomb killed tens of thousands at Nagasaki.) On Aug. 15, the Japanese surrendered unconditionally.
How is it possible that the Japanese leadership did not react more strongly to many tens of thousands of its citizens being obliterated?
One answer is that the Japanese leaders were not greatly troubled by civilian causalities. As the Allies loomed, the Japanese people were instructed to sharpen bamboo sticks and prepare to meet the Marines at the beach.
Yet it was more than callousness. The bomb - horrific as it was - was not as special as Americans have always imagined. In early March, several hundred B-29 Super Fortress bombers dropped incendiary bombs on downtown Tokyo. Some argue that more died in the resulting firestorm than at Hiroshima. People were boiled in the canals. The photos of charred Tokyo and charred Hiroshima are indistinguishable.
In fact, more than 60 of Japan’s cities had been substantially destroyed by the time of the Hiroshima attack, according to a 2007 International Security article by Wilson, who is a senior fellow at the Center for Nonproliferation Studies at the Monterey Ins ute of International Studies. In the three weeks before Hiroshima, Wilson writes, 25 cities were heavily bombed.
To us, then, Hiroshima was unique, and the move to atomic weaponry was a great leap, military and moral. But Hasegawa argues the change was incremental. “Once we had accepted strategic bombing as an acceptable weapon of war, the atomic bomb was a very small step,” he says. To Japan’s leaders, Hiroshima was yet another population center leveled, albeit in a novel way. If they didn’t surrender after Tokyo, they weren’t going to after Hiroshima.
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