
Kokutai is a uniquely Japanese concept often translated as ‘national polity’ or ‘national essence.’
It refers to the unique constitutional and spiritual essence of the Japanese nation and its people, centered historically on the Emperor as a symbol of continuity and unity. Kokutai is not just a political constitution but a broader idea of Japan’s national identity and political order. It embodies ideas about the Emperor’s divine descent (from Amaterasu, the sun goddess), Japan’s unique historical destiny, and the special relationship between the ruler and subjects.
In prewar and wartime Japan, Kokutai was used to legitimize the Emperor’s absolute sovereignty and Japan’s political system. It was often invoked to promote national unity, loyalty, and resistance to foreign political ideas like liberal democracy or socialism. Kokutai placed the Emperor at the center of sovereignty and moral authority. This made Kokutai both a political doctrine and a national ideology that justified Japan’s imperial system and mobilized the population.
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