Tokyo Metropolitan Government Bureau of Waterworks: Utility Account Brief

Executive overview

Key findings

JPY 469.2 billion: capital (construction and improvement) expenditure planned for FY2026 to FY2028, against JPY 132.4 billion actual in FY2024

13,928,448 people: served in FY2025 through 27,639 km of distribution mains and ten main purification plants

About 1 million: smart meters to be installed between FY2025 and FY2028, with all households planned for the 2030s

14% → 76%: share of purification capacity seismically reinforced, FY2024 actual against the FY2035 target

Buyer relevance

Who the report is for

Civil and seismic contractors

Follow the Sakai and Upstream purification plants and the plant-by-plant seismic works that take reinforced capacity from 14% toward 76% by FY2035.

Pipe, valve and trenchless suppliers

Map the conveyance and transmission duplication schedule, from the Shin-Jonan trunk main in FY2030 to the Upstream plant mains in FY2032.

Meter and communication equipment makers

Track the numbered lots behind the plan for about 1 million smart meters by FY2028.

Business development teams

Use the opportunity register and priority table to decide where to register and bid first.

Decision scope

Questions answered

How much will the Bureau spend on capital?

JPY 469.2 billion is planned over FY2026 to FY2028, against JPY 132.4 billion actual in FY2024.

How does the Bureau buy?

Through electronic tenders on the Tokyo Metropolitan Government's system; smart meter communication units lot 7 was announced on 7 January 2026 by general competitive bidding.

Who holds the largest current plant contract?

A joint venture of Obayashi Corporation, Muramoto Construction and Toyo Fujiko won the first Sakai advanced treatment construction contract on 24 March 2025.

Are operations open to outside suppliers?

Plant and customer operations are moving to Tokyo Water Co., Ltd. under performance-based contracts introduced in FY2025, so access is mainly through that company.

Inside the report

Inside the complete report

1. The Account at a Glance

2. Organisation and Decision-Making

3. Financial Position

4. Priorities and Pressures

5. How Tokyo Metropolitan Government Bureau of Waterworks Buys

6. Opportunity Register

7. Commercial Priorities: Where to Focus First

8. Watch List: What to Monitor and What to Do

Source Register

Public preview

What to watch next

FY2027 budget

First test of the plan's FY2027 capital figure of JPY 157.3 billion.

Smart meter lots

Recurring purchases through FY2028.

Sakai and Upstream plant tenders

The largest plant construction in the pipeline.

Tariff review after FY2028

Tariffs are held at their current level until then, and the plan expects bond redemptions to weigh on finances from FY2034.

Landscape report page with the Opportunity Register table of Tokyo Bureau of Waterworks projects, from the Sakai plant reconstruction to supply stations, with status and access routes. — Sample page · page 7 of 11
The Opportunity Register lists each project's status, stage, existing contractors, supplier categories and route in.

Included

What you receive

The complete PDF report: 11 pages, 9 sections, 7 tables and a register of 17 sources.

This edition

October 2026 edition.

Evidence & method

Evidence and method

The brief draws on the Bureau's Management Plan 2026 and financial statements, plan tracking tables, the Tokyo Metropolitan Government's procurement pages, published bid results and tender notices for Bureau projects, and the Bureau's PFI and smart meter procurement documents, checked on 29 October 2026.

Sources

17 sources, listed in the report's source register. Evidence current to 29 October 2026. Principal data periods: Water Supply Business Account statements to FY2024 and operating statistics to FY2025 (Japanese fiscal years, April to March); Management Plan 2026 (FY2026 to FY2028). Project and procurement status checked against public sources on 29 October 2026. All currency is Japanese yen (JPY)..

Lead analyst

Robert C. Brears

Founder, Our Future Water Intelligence

Robert C. Brears is a water-security specialist and author whose work examines utility governance, infrastructure investment, climate resilience and long-term water-system change for executive and policy audiences.

Decision-focused utility intelligence
Published water-policy author
Evidence-grounded system analysis

Buyer FAQs

Before you purchase

Who can use the report?

Licensed for internal use within one purchasing organization. The PDF and its contents may be shared with colleagues within that organization. External redistribution, resale and public publication are prohibited without permission.

How is the report delivered?

The PDF is available to download immediately after confirmed payment, through our secure delivery system.

Can my organization buy wider access?

Institutional purchasing: For invoice enquiries, multi-organization licensing or broader access requirements, contact Our Future Water Intelligence.