Yonai Mitsumasa

ModernGeneralJapan1880 — 1948

Admiral PM who opposed war with the Allies.

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Quick Facts

Born

1880

Died

1948

Country

Japan

Era

Modern

Occupation

General

Score Overview

Military (10%)50

Political (20%)68

Influence (20%)56

Legacy (20%)48

Leadership (15%)72

Strategy (15%)58

Total Score57.8

Yonai Mitsumasa — Complete Timeline

1940 AD

Opposition to War with the AlliesPolitical Action◆ Major

As Prime Minister in 1940, Yonai Mitsumasa opposed signing the Tripartite Pact with Germany and Italy, arguing it would lead to war with the United States and Britain. His resistance delayed the alliance but ultimately failed, and he was forced to resign.

Tripartite PactOppositionForeign Policy

Impact: globalconstructive

Resignation Over Tripartite PactPolitical Action◆ Major

Yonai resigned as Prime Minister in July 1940 after the army forced his hand over the Tripartite Pact. His resignation cleared the way for the pro-Axis cabinet of Konoe Fumimaro, which signed the pact in September 1940.

ResignationAxis Alliance

Impact: nationaltragic

Service as Prime MinisterPolitical Action◆ Major

Yonai Mitsumasa became Prime Minister in January 1940, succeeding Abe Nobuyuki. His cabinet pursued a neutral foreign policy and sought to avoid war, but faced intense pressure from the military to align with Germany.

Prime MinisterNeutrality

Impact: national

1945 AD

Post-War Role as Deputy Prime MinisterPolitical Action◆ Major

After Japan's surrender, Yonai served as Deputy Prime Minister in the Higashikuni and Shidehara cabinets from 1945 to 1946. He oversaw the demobilization of the Japanese military and cooperated with the Allied occupation authorities.

Post-WarOccupationDemobilization

Impact: nationalconstructive