Minister of Finance
Appointed Minister of Finance
Role range: 1924-1925
Historical biography archive · Updated 2026-11-03
Hamaguchi Osachi Biography and Timeline
Follow Hamaguchi Osachi through 14 dated historical records for Japan.
Hamaguchi Osachi, historical timeline
A chronological timeline drawn from matching World History Database records.
14Distinct records
1 of 1Page
1924–1931Years on this page
1924
1927
Home Secretary of Japan
Appointed Home Secretary
Role range: 1927-1929
1929
Break in Diplomatic Relations with China
Japan severs relations with China
Role range: 1929-1930
Economy of Japan
The US stock market crash is followed by a depression
Role range: 1929-1930
Prime Minister of Japan
Appointed Prime Minister of Japan
Role range: 1929-1930
Party Leader
Appointed Party Leader of the Minseito Party
Role range: 1929-1930
Treaty of Four Power Naval
The Navy is unhappy & appeals to the Emperor but the Treaty is ratified in the Diet. The 4 powers meet in London & extend the original 4 Power Navy Treaty. Japan accepts limits of 10:10:6 cruisers & 10:10:7 destroyers. Japan accepts equal submarines with the US
Role range: 1929-1930
Treaty of Four Power Naval
The Navy is unhappy & appeals to the Emperor but the Treaty is ratified in the Diet
1930
Conference of London
The tonnage ratio for US, British & Japanese cruiser fleets will be 10:10:7. Creates a militaty reaction against liberal policies & ambition to master the Pacific
Role range: 1929-1930
Naval Ratio
Defends the London compromise granting Japan a higher relative ratio in several auxiliary ship categories than under earlier proposals.
Role range: 1929-1931
Treaty Ratification
Secures Japanese ratification of the London Naval Treaty despite strong domestic opposition.
Role range: 1929-1931
Assassination of Hamaguchi Osachi
Osachi is shot & injured because of the ratification of the 4 Power Navy Treaty. Death of Hamaguchi Osachi, assassinated
Role range: 1929-1930
Sakuraki
The "Cherry Blossom Society" is formed by military officers to establish a regime
Role range: 1929-1930
1931
Death of Hamaguchi Osachi
Death of Hamaguchi Osachi, assassinated
Role range: 1929-1930
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.