1001 Smart Cities
🇯🇵 Nagoya

NICOS — Nagoya City Flood-Fighting Information System

🤖 AI-generated summary · ◆ 10 sourced claims · 🔎 Last verified

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

10 sourced claims on this page, none individually verified yet — turn on “Sources in the text” to see each one.

How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page

Nagoya's flood dashboard only displays readings. What a reading sets off is written elsewhere: pumps stop at fixed gauge heights, and evacuation orders follow a reference level plus a headquarters decision.

Outcome🔄 Ongoing
Evidence🏛️ Official
what does this mean?The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →
Run byNagoya City Crisis Management Bureau
Scale🏙️ City-wide

Part of 1001 Smart Cities — 1,216 documented projects · 🏙️ 5 more in Nagoya · 🌊 Flood resilience guide · 🌱 Environment projects

Nagoya's Disaster Prevention and Crisis Management Bureau publishes current rainfall and river water-level readings for the city and its surroundings through NICOS, the Nagoya City Flood-Fighting Information System, whose website was relaunched in March 2022. The city's disaster portal lists it alongside four separate feeds: the Water and Sewerage Bureau's pump-operation status, the city's road and river camera images, and the river pages of the national Shonai River Office and Aichi Prefecture. NICOS itself only displays readings; what a reading sets off is written in the city's rules. Drainage pumps discharging into the Shonai, Yada, Shin, Nikko and Toda rivers are stopped when named gauges reach fixed heights, and the city issues evacuation information when it does so. Evacuation orders for the larger rivers are issued when a reference water level is reached and the city's disaster headquarters judges it necessary; on smaller rivers and drainage channels they follow pre-set criteria on water level, rainfall and gate closure.

Live

📊 Impact

The system has not been evaluated, and no source links a NICOS reading to a specific decision. On 8 September 2026 the city issued river-by-river evacuation orders from 16:10, and by 18:10 emergency-safety orders covered 1,172,102 people. As of 16 September the city recorded no deaths, 35 minor injuries and 279 homes flooded above floor level.

🎓 Lesson

A flood dashboard is the visible rung; the consequence sits in rules published elsewhere. Nagoya pins its pump shutdowns to gauge heights on named rivers and its evacuation orders to reference water levels plus a headquarters decision — so the page that tells a reader what a reading does is not the dashboard but the criteria behind it.

🌱 EnvironmentFlood resilienceSensors & IoT

Sources

↗ Nagoya City — rainfall/river water-level observation informationconfirms NICOS is a city-operated system among five rainfall/water-level data sources shown to residents, alongside MLIT Shonai River Office and Aichi Prefecture feeds
↗ NICOS — Nagoya City Flood-Fighting Information System (live dashboard)the public-facing system itself
↗ Nagoya City Disaster Prevention (official account) — NICOS site renewal noticePublished 30 March 2022official city disaster-prevention account describing NICOS's purpose: check local rainfall/river levels ahead of evacuation decisions
↗ Nagoya City — evacuation-order criteria for flood disasters (alert level 4)The city's criteria for alert-level-4 evacuation orders in flood disasters: for the larger rivers, a reference water level plus a decision by the city's disaster headquarters; for smaller rivers and channels, pre-set criteria on water level, rainfall and gate closure.
↗ Nagoya City — criteria for stopping drainage pumps, and evacuationSets the gauge heights at which drainage pumps discharging into the Shonai, Yada, Shin, Nikko and Toda rivers are stopped to protect the embankments, and states that the city issues evacuation information when it stops them.
Show 1 more sourcesShow fewer
↗ Nagoya City — damage and evacuation record, heavy rain of 8 September 2026Updated 25 September 2026The city's running record of the 8 September 2026 downpour: evacuation orders by time and river, the population covered, casualties and building damage (preliminary figures).
Show your work What this page rests on and what it can’t tell you · all 10 claims with their sources · the forensic record

Evidence file · public beta 10 addressable claims, 6 source dossiers, one permanent baseline. The file is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 10

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-a154a7745d02156c descriptive
Nagoya's Disaster Prevention and Crisis Management Bureau publishes current rainfall and river water-level readings for the city and its surroundings through NICOS, the Nagoya City Flood-Fighting Information System
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city page, maintained by the Disaster Prevention and Crisis Management Bureau, links the 'Nagoya City Flood-Fighting Information System (NICOS)' for checking rainfall and river levels where residents live; the city's official account describes it as showing 'rainfall and river water levels in the city and surrounding areas'.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Nagoya City — rainfall/river water-level observation information
  2. Nagoya City Disaster Prevention (official account) — NICOS site renewal notice
Claim 2 clm-b90d3f8e0287994a quantitative
whose website was relaunched in March 2022
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city's official disaster-prevention account announced on 30 March 2022 that the NICOS website 'has been renewed'.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Nagoya City Disaster Prevention (official account) — NICOS site renewal notice
Claim 3 clm-67f08fe1aecfb3f9 descriptive
The city's disaster portal lists it alongside four separate feeds: the Water and Sewerage Bureau's pump-operation status, the city's road and river camera images, and the river pages of the national Shonai River Office and Aichi Prefecture
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The portal page lists five links: NICOS; the Water and Sewerage Bureau's rainwater information showing drainage-pump operation; the road/river monitoring system with city camera images; the Ministry of Land, Infrastructure, Transport and Tourism's Shonai River Office; and Aichi Prefecture's river disaster information.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Nagoya City — rainfall/river water-level observation information
Claim 4 clm-893d4b87a2e670dc descriptive
NICOS itself only displays readings
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city describes NICOS as a site where rainfall and river levels 'can be viewed'; the dashboard offers maps of observed rainfall and water levels plus links to national weather warnings, with no control function for the public.
Caveat
The dashboard also has a staff view that is not public; what it offers officials is not documented.

Sources carrying this claim

  1. Nagoya City — rainfall/river water-level observation information
  2. NICOS — Nagoya City Flood-Fighting Information System (live dashboard)
Claim 5 clm-48bd5173444c8e5d descriptive
Drainage pumps discharging into the Shonai, Yada, Shin, Nikko and Toda rivers are stopped when named gauges reach fixed heights, and the city issues evacuation information when it does so
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city sets pump-adjustment rules for the Shonai, Shin, Nikko and Toda rivers — for example, pumping stations draining into the Shonai and Yada stop when the Biwajima Bridge gauge reaches T.P. 8.00 m — and states that because stopping pumps can worsen flooding, it issues evacuation information when it does so.
Caveat
The page does not say whether the shutdown itself is automatic or carried out by staff.

Sources carrying this claim

  1. Nagoya City — criteria for stopping drainage pumps, and evacuation
Claim 6 clm-3a5162ed1302702e descriptive
Evacuation orders for the larger rivers are issued when a reference water level is reached and the city's disaster headquarters judges it necessary
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
For the flood-forecast and water-level-notified rivers, the alert-level-4 criterion is that the reference water level is reached and, weighing forecast rainfall, the city's disaster (alert) headquarters deems an order necessary.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Nagoya City — evacuation-order criteria for flood disasters (alert level 4)
Claim 7 clm-3ed3b9bcafda27fc descriptive
on smaller rivers and drainage channels they follow pre-set criteria on water level, rainfall and gate closure
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
For the other rivers and drainage channels (Shinjizo, Namatana, Sakai and others), the city has set criteria based on river level, rainfall and the closing of water gates, and issues the order when they are met.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Nagoya City — evacuation-order criteria for flood disasters (alert level 4)
Claim 8 clm-c5729ef706d120b0 quantitative
On 8 September 2026 the city issued river-by-river evacuation orders from 16:10, and by 18:10 emergency-safety orders covered 1,172,102 people
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city's record lists orders by river from 16:10 on 8 September (elderly-evacuation for Mizuba, Hori and Shinhori rivers) and, at 18:10, emergency safety assurance for 607,879 households and 1,172,102 people.
Caveat
The record shows what the city ordered, not what the orders were based on; no source ties a specific order to a NICOS reading.

Sources carrying this claim

  1. Nagoya City — damage and evacuation record, heavy rain of 8 September 2026
Claim 9 clm-f376568f0abbd1a8 quantitative
As of 16 September the city recorded no deaths, 35 minor injuries and 279 homes flooded above floor level
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city's damage table as of 15:00 on 16 September shows zero deaths, 35 minor injuries and 279 buildings with above-floor flooding (preliminary figures).
Caveat
Preliminary figures; the city marks them as provisional.

Sources carrying this claim

  1. Nagoya City — damage and evacuation record, heavy rain of 8 September 2026
Claim 10 clm-a137d61e67feae66 descriptive
Nagoya pins its pump shutdowns to gauge heights on named rivers and its evacuation orders to reference water levels plus a headquarters decision
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The pump page fixes shutdown levels at named gauges; the alert-level-4 page ties orders on the larger rivers to a reference level and a headquarters decision.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Nagoya City — criteria for stopping drainage pumps, and evacuation
  2. Nagoya City — evacuation-order criteria for flood disasters (alert level 4)
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-09-27-baseline effective 2026-09-27 · created 2026-09-27

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:23dfc61ec63c1d5db287109aa6e1cae5ae074eb3a62546fee4fcf8a22a0c573a
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
10
of 10 claims mapped
6
source dossiers
1
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Nagoya City Crisis Management Bureau
Actor types
city-government
Funding model
public
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

6 source dossiers

Nagoya City — rainfall/river water-level observation information city.nagoya.jp · 3 linked claims

Open original source ↗

Stable source ID
src-65b63fe0c22a5b5f
Publisher
Name not classified · city.nagoya.jp
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

confirms NICOS is a city-operated system among five rainfall/water-level data sources shown to residents, alongside MLIT Shonai River Office and Aichi Prefecture feeds

Descriptive only — not page/paragraph exact
Claims linked
NICOS — Nagoya City Flood-Fighting Information System (live dashboard) nagoya-city.mec-weather.jp · 1 linked claim

Open original source ↗

Stable source ID
src-13c52925792740e0
Publisher
Name not classified · nagoya-city.mec-weather.jp
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

the public-facing system itself

Descriptive only — not page/paragraph exact
Claims linked
Nagoya City Disaster Prevention (official account) — NICOS site renewal notice x.com · 2 linked claims

Open original source ↗

Stable source ID
src-30a95d360b321098
Publisher
Name not classified · x.com
Type / language
web-page · language not classified
Published
2022-03-30
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

official city disaster-prevention account describing NICOS's purpose: check local rainfall/river levels ahead of evacuation decisions

Descriptive only — not page/paragraph exact
Claims linked
Nagoya City — evacuation-order criteria for flood disasters (alert level 4) city.nagoya.jp · 3 linked claims

Open original source ↗

Stable source ID
src-a113b001c82ad9aa
Publisher
Name not classified · city.nagoya.jp
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The city's criteria for alert-level-4 evacuation orders in flood disasters: for the larger rivers, a reference water level plus a decision by the city's disaster headquarters; for smaller rivers and channels, pre-set criteria on water level, rainfall and gate closure.

Descriptive only — not page/paragraph exact
Claims linked
Nagoya City — criteria for stopping drainage pumps, and evacuation city.nagoya.jp · 2 linked claims

Open original source ↗

Stable source ID
src-6e3bb3cef822c1e6
Publisher
Name not classified · city.nagoya.jp
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Sets the gauge heights at which drainage pumps discharging into the Shonai, Yada, Shin, Nikko and Toda rivers are stopped to protect the embankments, and states that the city issues evacuation information when it stops them.

Descriptive only — not page/paragraph exact
Claims linked
Nagoya City — damage and evacuation record, heavy rain of 8 September 2026 city.nagoya.jp · 2 linked claims

Open original source ↗

Stable source ID
src-abe11f2d6e8a4625
Publisher
Name not classified · city.nagoya.jp
Type / language
web-page · language not classified
Published
Not recorded
Updated
2026-09-25
Source last checked
No source-level check date
Record last verified
2026-09-27
Dossier created
2026-09-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The city's running record of the 8 September 2026 downpour: evacuation orders by time and river, the population covered, casualties and building damage (preliminary figures).

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this file
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.

Continue exploring

Compare this project

🇺🇸 FIRST — City of Houston's Bayou Flood Early-Warning System · Houston Same shape: Houston's FIRST also just publishes flood-inundation maps for officials to act on, not to trigger anything itself. 🇨🇴 SIATA Early Warning Network · Medellín Peer info-only network: SIATA's cameras filmed a fatal 2023 flood live with no response — the same publish-don't-act limit here. 🇨🇳 Automated Waterlogging Monitoring & Early-Warning System · Tianjin Contrast in automation: Tianjin's sensors report every 5 minutes into an automated warning; NICOS just displays readings.

Explore the wider context

📟 A Reading Is Not a Decision📖 Flood early-warning system📖 Adaptive traffic signals📖 Air quality index (AQI)
📎 Cite this project

1001 Smart Cities (2026). “NICOS — Nagoya City Flood-Fighting Information System” — Nagoya, Japan. The Smart City Atlas. https://1001smartcities.org/projects/nagoya-nicos-flood-monitoring/ (last verified 2026-09-27). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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