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Postwar requisition and return of urban areas (Showa 20 (1945)-1961)

Last Updated July 2, 2024

Recovery by the Allied Forces and War Damage Recovery


An urban area surrounded by fierce fire. The Yokohama Air Raid has caused severe damage of 3,650 dead and over 300,000 affected people.

In 1945, the Allied Forces stationed after World War II, requisitioned the center of Yokohama City and port facilities. The requisition escaped the war and ranging from slightly remaining urban houses, offices, theaters and department stores in urban areas to public facilities such as government offices, schools, and parks, and the city's urban functions were almost paralyzed. In addition to the center, facilities of the former military were requisitioned on a large scale.



The 8th Army of the United States started landing from Osanbashi.
Of the 400,000 occupation forces, about 100,000 were stationed in Yokohama.

As a result, the head offices of trading companies, financial institutions and corporations that supported the Yokohama economy before the war were forced to relocate to Tokyo and other regions. Along with the requisition of port facilities such as Osanbashi, Yokohama lost its economic base which should be the driving force for reconstruction.



Yokohama Customs had a temporary headquarters for the Allied Forces, and later the United States Army Command. (Around 1945)

The requisition facilities and areas at that time were constantly fluctuated due to the influence of occupation policies, but the Korean War that broke out in June 1950 increased demand for military facilities in Japan and further delayed the requisition.


Main Events
ShowaMain Events
20 yearsMay 29: The Yokohama Air Raid
August 15 ... End of the war
August 30 ... Arrived at Atsugi Airfield, MacArthur, and stationed in Yokohama
September 2: Signing of surrender document (off Honmoku), United States 8th Army landed in Yokohama
October 24: Establishment of the United Nations
21 YearsNovember 3: Promulgation of the Constitution of Japan (enforced on May 3, 2010)
22 yearsOctober 16: Reacquisition of Kamiseya base (re-requisite on March 15, 2014)
25 yearsJune 25: The Korean War broke out
October 21: Promulgation and enforcement of the Yokohama International Port Capital Construction Law
26 yearsAugust 2: Establishment of Yokohama City Reconstruction and Construction Conference
September 8: Signing of the Peace Treaty with Japan and the former Japan-U.S. Security Treaty
27 YearsFebruary 15: Deletion of Osanbashi
February 28: Signing of an administrative agreement
March 1: Release of water requisition in Yokohama Port
April 8: Deletion of Yokohama Park (part)

From requisition to provision, return of urban areas


Around Kannai, Kamaboko barracks were lined up one after another at the burnt site. (Around 1950)

In Yokohama, with the city planning based on the "Yokohama International Port Capital Construction Law" enacted in 1950, the momentum to develop a requisition movement to lift requisition movement. In August 1951, Kanagawa Prefecture and Yokohama Chamber of Commerce and Industry established the Yokohama City Reconstruction and Construction Conference, and started a full-scale movement for requisition was started.



The Negishi Racecourse district was used as a golf course and heliport for U.S. military personnel. (Showa 20s)

In September 1951, the Peace Treaty (Kowa Treaty) and the former Japan-US Security Treaty were concluded.In 1952, based on an administrative agreement between the United States and the United States, the requisition area in the city was renewed to the US military. Will be provided.



Requisition land (red part) at the time of the establishment of Yokohama City Reconstruction Construction Conference
(Aug. 1951) Status of requisition of Yokohama Port Area

On the other hand, with the entry into force of the Peace Treaty in 1952, Japan and the United States agreed on a relocation plan to consolidate and relocate facilities in theYamashita Park area.
Furthermore, in 1957, the withdrawal of the U.S. Army ground fighting unit in Japan was announced, and Tana Ammunition Storage (now Children's Country) was returned.


Main Events
ShowaMain Events
27 YearsApril 28: The Peace Treaty, the former Security Treaty, and Administrative Agreement
July 26: Signing of the Japan-US Facility Area Agreement
28 YearsJuly 27: Signing of the Korean War ceasefire agreement
December 5: Return of the Japan Logistics Headquarters (JLC) (Yokohama Customs)
29 YearsJuly 1: Establishment of the Defense Agency and Self-Defense Forces launched
31 YearsDecember 18: Membership of the United Nations
32 years

June 21: Joint Statement between Kishi and Eisenhower
August 1 ... U.S. Department of Defense announced the withdrawal of U.S. Ground Fighting Forces in Japan

33 YearsMay 10 ・ ・ Commemorative Ceremony for the 100th anniversary of the opening of the port
June 30: Return of the JLC Procurement Department Office (Yokohama Port Opening Memorial Hall)
35 YearsJanuary 19: Signing of the New Security Treaty and Status Agreement (effective June 23)
June 15: Return of Yamashita Park Residential Area
36 YearsMarch 31: Establishment of the Yokohama City Council Requisition Promotion Committee
May 5: Return of Tana Ammunition Storage

For inquiries to this page

Base Countermeasures Section, Urban Development Bureau Planning Department

Phone: 045-671-2168

Phone: 045-671-2168

Fax: 045-663-2318

Email address: tb-kichitaisaku@city.yokohama.jp

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Page ID: 113-713-958

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