Former Koshiba Oil Storage Facility

Aerial photograph of the former Koshiba oil storage facility

October 3, 1948

December 14, 2005

Kanazawa Ward

Shibamachi, Nagahama, Koura 2-chome, Namiki 3-chome

Land:

526,205 square meters

State:

511,859 square meters (97.3%)

City-owned:

4,746 square meters (0.9%)

Private:

9,600 square meters (1.8%)

Building:

727 square meters (national)

Designation of regional districts, etc.:

Urbanization adjustment area, industrial area, industrial area, Type 1 residential area, Type 1 middle and high-rise residential area, semi-fire prevention area, Type 3 scenic area, Kanazawa Sangyo housing complex area special industrial area

There were 34 tanks and a stockpile of aircraft fuel. At sea, restricted water areas including A Bath (for large tankers) and B Bath (for small tankers) were set up, and pipelines (approximately 1,200 meters) were laid along the Nagahama Waterway.

※Please see this (use of former Koshiba oil storage facility ruins) about approach of use of former site.

October 3, 1948

The facilities of the former Japanese Navy were requisited by the U.S.

March 22, 1973

At the Japan-U.S. Joint Committee, it was agreed on the consolidation of pipeline relocation in connection with the Kanazawa Landfill.

December 4, 1975

The relevant property was delivered to the government following the completion of the pipeline relocation project, which started in September 1974.

February 24, 1977

The Japan-US Joint Committee agreed to relocate one underground oil storage tank (commonly known as No. 18 tank) to the facility (the government completed the relocation work in April 1979).

October 13, 1981

Tank No. 6 exploded and fire broke out, but the fire was extinguished in a joint activity between the city's Fire Bureau fire brigade and the U.S. military fire brigade.

October 18, 2004

The Japan-U.S. Joint Committee agreed to return a portion (approximately 10 hectares).

October 18, 2005

At the Japan-US Joint Committee, it was agreed that the return of the entire land area and a part of the restricted water area (approximately 4.6 hectares) by the end of 2005 and changes in the name and usage conditions of the restricted water area to be maintained.

December 2, 2005

We requested the government to manage the Koshiba oil storage facility after the return.

December 14, 2005

The entire land area of the Koshiba oil storage facility and part of the restricted water area have been returned.

March 31, 2008

We have formulated a basic plan to use the former site of the Koshiba oil storage facility.

February 13, 2009

In order to create a “forest for the 150th anniversary of the opening of the port”, approximately 1.5 hectares of land was entrusted by the government as a tree planting site commemorating the 150th anniversary of the opening of Yokohama.

June 11, 2009

The first forest tree-planting festival was held to commemorate the 150th anniversary of the opening of the port. (The second meeting was held on October 17, 2009.)
Number of participants: Approximately 800 people (total of the first and second sessions)
Number of trees planted: Approximately 11,200 bottles (total of the first and second sessions)

June 28, 2010

We received a report from the government (South Kanto Defense Bureau, Ministry of Defense) on the final results of the soil contamination survey.

February to March 2011

Planting work was carried out on the site of the Nagahama oil pipeline (Nagahama waterway).

February to March 2012

The government has begun some soil contamination countermeasures, but has stopped soil contamination countermeasures due to spring water.

From July 2012

The government has begun monitoring groundwater.

September 4, 2012

We received a proposal from the government regarding the disposal of state-owned land by free loan.
(As of August 31, 2012)

November 21, 2012

The city responded to the government that it would accept a proposal for free loan of state-owned land.

February 12, 2013

The 241st Kanto Regional Council on National Property was held, and a report was issued stating that "it was appropriate to lend the state-owned land of the former Koshiba oil storage facility to Yokohama City free of charge as a city park site." In response, the government decided on a policy for treating state-owned property.

July 22, 2014

(Tentative name) We have formulated a basic plan for the former Koshiba oil storage facility site park.

August 1, 2014

(Tentative name) Environmental impact assessment procedures for Koshiba Oil Storage Facility Site Park have been undertaken.

July 14, 2017

(Tentative name) The former Koshiba oil storage facility site park was designated as a city planning park.

August 14, 2017

(Tentative name) The construction of the former Koshiba oil storage facility site park was started.

September 21, 2017

Concluded a free loan agreement for state-owned land.

July 30, 2021

Part of the first area was opened as "Koshiba Nature Park".

※In addition, about (tentative name) Koshiba oil storage facility ruins park, you can see here (Midori Environment Bureau homepage).