Shōwa era

The Shōwa period (昭和時代, Shōwa jidai^?, potentially "period of enlightened peace/harmony" or "period of radiant Japan"), or Shōwa era, was the period of Japanese history corresponding to the reign of the Shōwa Emperor, Hirohito, from December 25, 1926, through January 7, 1989.

The Shōwa period was longer than the reign of any previous Japanese emperor. During the pre-1945 period, Japan moved into political totalitarianism, ultranationalism and fascism culminating in Japan's invasion of China in 1937. This was part of an overall global period of social upheavals and conflicts such as the Great Depression and the Second World War.

Defeat in the Second World War brought about radical change to Japan. For the first and only time in its history, Japan was occupied by foreign powers; this occupation lasted seven years. Allied occupation brought forth sweeping democratic reforms. It led to the end of the emperor's status as a living god and the transformation of Japan into a democracy with a constitutional monarch. In 1952, with the Treaty of San Francisco, Japan became a sovereign nation once more. The post-war Shōwa period also led to the Japanese economic miracle.

In these ways, the pre-1945 and post-war periods regard completely different states: the pre-1945 Shōwa period (1926–1945) concerns the Empire of Japan, while post-1945 Shōwa period (1945–1989) was a part of the State of Japan.

...
Wikipedia