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Yokohama Water Supply Long-Term Vision and Medium-Term Management Plan (from FY2016)

Final update date July 9, 2020

We devised "Yokohama Channel medium-term management plan (Reiwa 2 to 5)"! !

In Water Works Bureau City has recently formulated the "Yokohama Water Supply Medium-Term Management Plan (Reiwa 2 to 5)".
In order to realize the basic philosophy of the Yokohama Water Supply Long-Term Vision, `` Yokohama Water that supports the future of living and towns, '' this plan will strengthen the operating base and financial base so that it can be an organization that can steadily promote water supply system restructuring. We work on reinforcement of foundation of water supply business such as.
In addition, as the water supply business enters a business environment that has never been experienced before, such as population decline and private entry, we aim to be a public enterprise that demonstrates economic efficiency and publicity at a higher level.
In citizen opinion offer (from January 14, 1980 to February 12, Reiwa) that we carried out in development of this plan, we thank you for many opinions.

Yokohama Water Supply Medium-Term Management Plan (Reiwa 2 to 5)

Overview of the Plan

Environment surrounding the water supply business

  • Further decrease in water tariff revenue due to population decline and changes in water demand structure
  • Increased demand for renewal due to aging water supply facilities
  • Responding to diversifying natural disasters such as earthquakes and heavy rain
  • Enforcement of the revised Water Supply Law aimed at strengthening the water supply base


  • Strengthening the foundation of the water supply business
We will work to strengthen our management and financial base to enable sustainable business management in the future.
  • Demonstration of economic and public nature
As the environment surrounding the water supply business changes drastically, such as population decline and private entry, we will pursue economic efficiency and conduct business management that is more public than ever.

Composition of the Plan

Outline version leaflet and booklet

Implementation summary of citizen opinion offer [opinion offer was finished]

Application period

From January 14 (Tuesday) to February 12 (Wednesday) of Reiwa 2 [Opinion offer was finished]

Implementation results

Yokohama Water Supply Long-Term Vision / Medium-Term Management Plan (2016-Reiwa 1st year)

The “Yokohama Water Supply Long-Term Vision” was voted on and finalized at The 1st City Counsil Water Supply Medium-Term Management Plan (2016-Reiwa), which is a concrete implementation plan for the first four years. Year).
In the future, in line with these, we will improve services so that we can use safer and higher quality water at any time while flexibly responding to changes in the times and society, and cooperate with the people who support the business We will promote business management under the relationship and pass on the water supply trusted by customers to the next generation.

≪Points of this plan≫

  • A device that is easy to read even for those who are not familiar with water supply by using a lot of photos and diagrams and enhancing the glossary
  • The future vision is described in a story style for each of the five areas.
  • Considering the water droplet as a symbol of the origin of the water supply, the first drop of Doshi Water Source Forest, one of the water sources of Yokohama, is expressed on the cover.

Cover of Yokohama Water Supply Long-Term Vision and Medium-Term Management Plan

Long-term vision


Long-term prospects for water supply and industrial water supply business 20 to 30 years from now

Basic Principles

"Water of Yokohama which supports the future of living and town"

Future vision

We draw a future image divided into five areas so that customers and people involved in the water supply business can easily imagine the future from their respective standpoints.

Future in each area

Medium-term Management Plan (FY2016-Reiwa 1)

Policy Goal 1: Safe and High-quality water

Major businesses (examples)

[Redevelopment of Nishitani Water Purification Plant]
In order to enable stable water purification treatment in line with the earthquake resistance of facilities, we started redevelopment to introduce granular activated carbon treatment.

Policy Goal 2: Water Supply Resistant to Disasters

Major businesses (examples)

Image of a new sign at a water station during a disaster
Policy Goal 2
New sign of disaster water station

[Maintenance of water stations during disasters]
In order to raise awareness, we will gradually renew the signs decided by customer vote.
[Planned pipeline renewal and earthquake resistance]
Prioritize renewal, level out the business, and steadily implement renewal and earthquake resistance.

Policy Goal 3: Environmentally Friendly Water Supply

Major businesses (examples)

[Continuous introduction of renewable energy]
Introduce small hydroelectric power generation based on surveys

Policy Goal 4: Enhanced Information and Services

Major businesses (examples)

[Efforts to realize the water supply close to living]
We carry out delivery water supply classroom sequentially and hold "construction site visit" on a trial basis.

Goal 5: Social Contribution in Japan and Overseas

Major businesses (examples)

Acceptance of trainees from Africa (repair of water leakage)
Policy Goal 5
Accept trainees from Africa
(Water leak repair work)

[Promotion of ordering to working facilities for persons with disabilities]
Actively ordering disassembly of used water meters
[Promotion of cooperation with Yokohama Water Co., Ltd.]
In cooperation with Yokohama Water Co., Ltd., it contributes to solving problems in domestic and overseas water supply businesses.

Goal 6: Sustainable Management Base

Major businesses (examples)

[Improvement of organizational strength through human resource development]
Utilize master engineer system to steadily pass on technology and know-how to the next generation of leaders

Yokohama Water Supply Long-Term Vision / Medium-Term Management Plan (2016-Reiwa 1st year)

Long-term vision

Medium-term Management Plan

Overview leaflet

Outline of Public Comments

Application period

From January 4, 2016 (Monday) to February 3, 2016 (Wednesday)

Implementation results

We received 137, 393 opinions from citizens.

≪Click here for the results of public comments.≫

Progress of the Plan

Achieving the Plan

Regarding the reflection of the policy targets at the end of FY2019, of the 49 businesses excluding the two businesses that changed the policy, 43 businesses were "exceeding the target" and "generally as the target". As a whole, we have achieved our goals. We will continue to work on improving and promoting businesses in the six businesses that have fallen below the target.

Results of Operations
Achievement statusNumber of Operations (51)Ratio
I exceeded my goal.1327%
As expected,-3061%
It was below the target.612%
Policy changes2

・Review of Yokohama Channel medium-term management plan (2016-Reiwa first year) (PDF: 855KB)

For inquiries about water supply, please contact Water Works Bureau Customer Service Center.

Water Works Bureau Customer Service Center

Telephone: 045-847-6262 Fax: 045-848-4281
※Please be careful not to make a mistake.

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Inquiries to this page

Corporate Planning Division, Water Works Bureau Business Planning Division

Telephone: 045-671-3127

Telephone: 045-671-3127

Fax: 045-212-1157

Email address: [email protected]

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