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Japan Metropolitan Area Outer Underground Discharge Channel (G-Cans Project)

Sector: Aerospace & Defense • Location: Tokyo, Japan

Source: The Logical Indian

Project
Completed

Japan constructed the G-Cans Project, an underground flood channel consisting of a 6.3 km tunnel system connected to the Edogawa River with five large silos that store floodwaters temporarily and pump them out to prevent urban flooding in Tokyo.

Status
Closed
Sector
Aerospace & Defense, Tunnel, Commercial, Residential
Location
Tokyo, Japan
Updated
22 Jul 2026
Source
The Logical Indian

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Project Information

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The project “Japan Metropolitan Area Outer Underground Discharge Channel (G-Cans Project)” is an infrastructure initiative in the Aerospace & Defense sector, located in Tokyo, Japan. Taiyo aggregates data on it from The Logical Indian.

Participants

Not available for this record.

Status

Original status

completed

Taiyo status

Closed

Taiyo last update

2026-07-22

Contact

Not available for this record.

Description

Description

Japan constructed the G-Cans Project, an underground flood channel consisting of a 6.3 km tunnel system connected to the Edogawa River with five large silos that store floodwaters temporarily and pump them out to prevent urban flooding in Tokyo.

Original sector

Flood Defense

Budget

Location

Country

Japan

City

Tokyo

Source

Source

The Logical Indian

URL

More Details

Record type

Project

Sector

Aerospace & Defense, Tunnel, Commercial, Residential

Article published date

2025-09-18

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