Infrastructure & Engineering Study Visit In-Person Open

Underground Sewage Systems: Kasukabe Project & Urban Flood Management

Visit the Metropolitan Outer Underground Discharge Channel in Kasukabe — the world largest flood-control tunnel — and study how Tokyo manages urban flooding through invisible mega-infrastructure.

Tokyo, Japan

5 days 35 hrs Tokyo, Japan ar / 15 seats

Overview

The Tokyo Metropolitan Area Outer Underground Discharge Channel (G-Cans Project) is a 6.3 km underground tunnel with five giant silos that can absorb the equivalent of 25 Olympic swimming pools per minute, protecting 1 million homes from flooding. This programme visits the facility with a civil engineering expert, examines the drainage masterplan for Greater Tokyo, and draws lessons for rapid-urbanisation challenges in Gulf cities.

Program Objectives

Understand the engineering principles and scale of urban underground drainage systems.
Analyse Tokyo flood management governance and financing model.
Apply lessons to flood risk management in rapidly urbanising cities.
Develop a concept design for flood-resilient infrastructure in a target city.

Requirements

Civil engineers, urban planners, municipal infrastructure directors, water management officials, and flood-risk specialists. Basic knowledge of drainage and hydrology is recommended.

Why This Program?

Tokyo Underground Cathedral That Stops Floods. See It in Kasukabe.

Five days studying the world largest flood-control tunnel and designing a drainage concept for your city.

Why this program
Flooding is the most expensive climate risk for cities. Japan built the G-Cans project to protect 1 million homes. This programme gives you the technical site access, engineering expertise, and governance models to replicate the concept in your region.

Why Japan
Japan has the world largest underground flood-control infrastructure and has integrated it with metropolitan governance, climate adaptation, and long-term maintenance planning.

Experience Summary
Five days in Tokyo and Kasukabe: G-Cans site visit, drainage masterplan, international comparisons, and city concept design.

Program Value

Mega-Infrastructure Scale

See the 6.3 km tunnel and five silos that protect 1 million homes.

Governance Model

Learn how Tokyo finances and coordinates metropolitan flood management.

Replicable Concept

Apply the lessons to your city with a custom drainage concept.

Learning Journey

During Program

G-Cans Site Visit

Walk through the massive silos and tunnels with the project engineers.

During Program

Drainage Masterplan

Study how Tokyo coordinates flood management across municipalities.

During Program

Global Comparisons

Compare flood resilience models from the Netherlands, Singapore, and Gulf cities.

After Program

City Concept

Present a drainage concept for your city with governance and cost outline.

Nomination Eligibility

This programme is designed for professionals nominated by their organisations to undergo specialised training in Japan. Nominees should have organisational sponsorship and a clear mandate to apply the learnings upon return.

Why Train in Japan

Japan is the birthplace of the methodologies taught in this programme. Training in Japan provides direct exposure to the original practices, site visits to world-class facilities, and interaction with Japanese experts who pioneered these approaches — an experience impossible to replicate in a local classroom.

Why Train Overseas

Overseas training in Japan offers immersive access to the source of these management and operational philosophies. Participants gain cultural context, real-world observation, and networking opportunities with Japanese organisations that cannot be delivered through domestic or online alternatives.

Field Visits Note

Field visits are subject to host organisation availability and may be substituted with alternative sites of equivalent educational value without prior notice.

Certificate Statement

NIHON GATE Certificate is awarded upon successful completion of all programme days, participation in all activities, and delivery of the final project or presentation as required.

How to Use This File for Nomination

1 Download this Program File for Corporate Approval.

2 Review the programme details, objectives, and outcomes with your supervisor.

3 Submit the file to your HR or training department for nomination approval.

4 Upon approval, complete your registration through the NIHON GATE portal.

5 Receive confirmation and pre-programme materials within 48 hours.

Back to Programs

Seconds before an earthquake, Japan's UrEDAS system detects the first seismic wave and automatically stops trains, elevators, and industrial lines — saving lives and infrastructure worth billions. Learn exactly how.