Asian Co-Prosperity Sphere

The  was the concept of a unified Asia to which Japan aspired prior to World War II. (PROSE: The Face of the Enemy)

This ambition precipitated the Pacific War, as the Japanese Empire fought campaigns Manchuria, China, (PROSE: The Shadow of Weng-Chiang, Log 384) Pearl Harbor, (PROSE: Only Connect) the Philippines (PROSE: Happily Ever After Is a High-Risk Strategy) Singapore (AUDIO: The Forsaken) and other Pacific Islands. (PROSE: Endgame)

The Co-Prosperity Sphere was ultimately never realised, as Japan surrendered to the Allies in 1945. (PROSE: Endgame, Log 384)

Parallel universes
In a parallel Earth later ravaged by the Inferno Project, where World War II never happened, the Asian Co-Prosperity Sphere was successfully established. It represented Asia collectively as a member of the Conclave, a super cabinet designed to ensure world peace which was composed of the leaders of the planet's five continents. (PROSE: The Face of the Enemy)

In one of the Known Worlds, Germania V, Japan similarly achieved Asian dominance after the United States of America maintained its neutrality in the war. (PROSE: Warlords of Utopia)