The idea later called Greater East Asia did not begin as a single doctrine. It accumulated through victory, treaty privilege, annexation, and a state vocabulary that framed expansion as security.
After the Russo-Japanese War, military planners read the continent as a strategic perimeter. Korea's 1910 annexation turned that perimeter into colonial administration, extracting land, labor, and identity through law.
The Kwantung Army transformed an incident beside a railway into an occupation regime. Manchukuo was announced as independence and administered as an instrument: resource corridor, industrial laboratory, and ideological display case.
Technocracy and coercion were not opposites. Survey maps, census tables, police registries, and rail timetables became the operating system of empire.
From 1937, undeclared war became total mobilization. Cities, villages, rivers, and supply routes entered a system of military occupation that blurred front line and civilian space.
Massacre, forced labor, biological warfare programs, and scorched-earth campaigns left records that resist abstraction. The archive must hold consequence without spectacle.
“Asia for Asians” was broadcast as liberation from Western empires. In practice, the sphere reorganized territories into a wartime supply architecture for Japan: oil, rice, rubber, tin, shipping, labor.
Local nationalists navigated collaboration, coercion, opportunity, and survival. The same slogan could signify hope in one room, requisition in another, and imprisonment in a third.
By 1945 the logistical body of empire had been severed. Garrison islands were bypassed, merchant shipping destroyed, cities burned, and civilians drawn into the terminal stage of state violence.
Collapse did not restore what occupation had taken. It produced new emergencies: repatriation, famine, trials, missing persons, and contested memories.
The formal empire ended; its archives did not. Trials, constitutions, apologies, compensation movements, textbook disputes, memorials, and diplomatic conflicts continued to define the terrain.
Historical reckoning is not a closing panel. It is a method: compare sources, name systems, follow consequences, and refuse the comfort of simplified memory.