How Long Did the Asian War Last?

From Asian Armageddon, 1944–45, by Peter Harmsen (War in the Far East, Book 2; Casemate, 2020), Kindle pp. 283-284:

The question of how long the war in the Asia Pacific lasted can also be put to the historian. The conventional answer is that it spanned less than four years, the time that passed between Pearl Harbor and Hiroshima. A slightly more unconventional reply would argue that it began in 1937 with the onset of all-out conventional hostilities between China and Japan. Recently, the Chinese government and some Chinese historians have asserted that the actual beginning of the war with Japan was in 1931, with the Japanese occupation of Manchuria. Obviously, the further back in time the start of the war is pushed, the more central becomes the role of China.

There is less controversy about the end of the war, as most agree on 1945 as marking the natural conclusion. Still, the conflicts which harrowed the region for the next three decades could in many ways be seen as consequences of the larger conflagration of the early 1940s. The internecine war that would lay waste to Korea only five years into the future came about partly as a result of the division of the peninsula into a Soviet-backed north and a US-supported south after the end of the Japanese occupation. Likewise, the numerous struggles against the Western colonial masters might be seen as having been kindled by the examples set by the Japanese. It could, therefore, be argued that the Japanese-American war of 1941 to 1945 was part of a much larger half-century-long narrative stretching from the civil wars of China of the 1920s all the way until the evacuation of Saigon in 1975. Perhaps it will take another century of writing about the conflict, and the sobering effect of time passed, to arrive at a satisfactory conclusion.

Whether now or in the distant future, one of the main objectives of history will be to learn from it. Some of the participants in the vast conflict began learning as soon as the weapons fell silent. On August 14, 1946, the first anniversary of Japan’s decision to accept unconditional surrender, emperor Hirohito met with Prime Minister Yoshida Shigeru as well as Suzuki Kantarō, who had headed the government at the end of the war. The emperor expressed regret at the way the war had developed but pointed out this had not been the first time Japan has suffered abject defeat. Events had come full circle. In the battle of the Paekchon River in 663, Japan had met China in battle for the first time in history, and it had been beaten and forced to withdraw to the home islands. “After that, political reforms were pushed forward, and the result was a major turning point in the development of Japanese civilization,” Hirohito said. “If we bear this in mind, we can naturally understand the road that Japan needs to take after this new defeat.”