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Sewerage in the Ward Area (Public Sewerage Business)


The sewerage business in the Tokyo 23-wards area is managed as a local municipal enterprise. In principle, necessary costs for sewerage operations are paid for with independently acquired revenues, such as sewerage service charges from customers.

Financial Structure of Ward Public Sewerage Business


Sources of revenue for ward public sewerage


  1. Construction costs
    Construction costs are the costs required to build pipes, pumping stations, and water reclamation centers. Construction costs are covered by national subsidies,  corporate bonds (long- term loans), etc.
  2. Operation, Maintenance and Management costs
    Operation, Maintenance and Management costs cover expenses necessary for maintaining sewerage facilities and operations, and paying for interest, etc.
    These costs are separated into money collected from sewerage service charges to pay for sanitary sewage treatment costs, and metropolitan funds (metropolitan tax, etc.) to pay for stormwater removal costs.

Principle of “private expense for sanitary sewage, public expense for stormwater”
- Sanitary sewage treatment: Covered by private expense as only specific users receive benefits
- Stormwater elimination: Covered by public expense (metropolitan tax, etc.) as society as a whole receives benefits

Sewerage in Tama area (Regional Sewerage Business)


The sewerage business in Tama area is managed as a local municipal enterprise, with a promotion of the operation and construction costs defrayed from the appropriate regional authorities.

Financial Structure of Regional Sewerage Business


Sources of revenue for regional sewerage


  1. Construction costs
    Construction costs for regional sewerage system are covered by national subsidies, constructuion defrayment from local authorities, metropolitan corporate bonds etc..
  2. Operation, Maintenance and Management costs
    Costs for the operation, maintenance and management of regional sewerage system are collected from the local authorities, and capital costs such as interest expences are covered by metropolitan funds, etc.

Outline of FY2019 Budget

The fiscal 2019 budget is the fourth year of the five-year Management Plan 2016, and was formulated based on a basic policy to proactively promote the sewerage business from a mid-to long-term outlook and to ensure the goals of the management plan are achieved.
Each and every bureau employee always looks at matters from a customer's point of view and gives his or her best to further enhance sewerage services.


Outline of FY2018 Financial Statement

The settled accounts of ward and regional sewerage business are as follows.
Regarding revenue expenditures and receipts, revenues were approximately 373.2 billion yen and expenditures were approxi-mately 337.9 billion yen. Net profit was approximately 35.3 billion yen.
Regarding capital expenditures and receipts, revenues were 183.3 billion yen (Excludes Compensated funds) and expenditures were 408.6 billion yen (including construction capital rolled over to the following year). There were capital deficits of 225.3 billion yen, but were compensated with reserve funds from the profit and loss accounts.
※Number count might not match with the total sum as fractional amount under displayed unit is rounded off and not adjusted.

Revenue /Capital Expenditures and Receipts (Ward and Regional total)


Balance Sheet (Ward and Regional Total)


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