Country reasoning

Context

Japan entered the war in 1914 to honor its alliance with Britain and to expand its influence in the Pacific and East Asia. Its military operations focused primarily on German colonial possessions.

Rationale used for numbers used on the war statistics page

Measure	Selected value	Selected source	Rationale
Population (baseline)	53,600,000	ww1-source-book The World War One Source Book

What sources report

Military deaths

Source	Value	Scope / notes	Citation
ellis_cox_1993 The World War I Databook John Ellis; Michael Cox • Aurum Press • 1993 medium	300	—	Ellis, John & Cox, Michael. The World War I Databook. London: Aurum

Mobilized / served

Source	Value	Scope / notes	Citation
ellis_cox_1993 The World War I Databook John Ellis; Michael Cox • Aurum Press • 1993 medium	800,000	—	Ellis, John & Cox, Michael. The World War I Databook. London: Aurum

Population (baseline)

CWVMP uses: 53,600,000 from ww1-source-book

Source	Value	Scope / notes	Citation
ellis_cox_1993 The World War I Databook John Ellis; Michael Cox • Aurum Press • 1993 medium	67,200,000	—	Ellis, John & Cox, Michael. The World War I Databook. London: Aurum
ww1-source-book The World War One Source Book Philip J. Haythornthwaite • Arms and Armour, London • 1993 medium	53,600,000	—	—
wikipedia-ww1 World War I casualties 2026 medium	53,600,000	—	— Source link (accessed 2026-02-01)

Editorial principles in selecting the figures to use

No rationale narrative yet for this country/conflict.

Discussion of discrepancies

No discussion narrative yet for this country/conflict.

Japan — WW1