World Tsunami Awareness Day
A/RES/70/203
A/RES/70/203
This authority record treats the observance as a fixed annual date. The same month and day can be reused unless a stronger source changes the rule. Public-holiday or government status is never inferred from the observance name alone.
Overview
World Tsunami Awareness Day is a United Nations observance held on 5 November to promote awareness, preparedness and disaster-risk reduction for tsunami hazards.
The day is especially relevant to coastal communities, but useful education also includes how warning systems, evacuation planning and international cooperation fit together.
Why it matters
Tsunamis can cross coastlines and national boundaries, so preparedness depends on both technical warning systems and communities knowing how to respond to official alerts and local plans.
An awareness guide should not invent universal evacuation instructions for every coastline. Readers should use the routes, alerts and emergency guidance issued by competent local authorities.
History
World Tsunami Awareness Day originated as a Japanese initiative; UNDRR records that Toshihiro Nikai first proposed the Day and that Japan played a leading role in its establishment.
The UN General Assembly designated 5 November as World Tsunami Awareness Day in December 2015 through resolution A/RES/70/203. The first observance took place on 5 November 2016.
The date was chosen in honour of the Japanese story “Inamura-no-hi,” associated with a community warning and evacuation during an 1854 tsunami. UNDRR facilitates the observance in collaboration with the United Nations system, while UNESCO-IOC has a separate technical role in tsunami warning and mitigation.
How the observance developed
This timeline is assembled only from verified provenance fields. Missing stages are omitted rather than inferred.
Japan (initiative first proposed by Toshihiro Nikai)
UNDRR describes World Tsunami Awareness Day as the brainchild of Japan and records that Toshihiro Nikai first proposed the Day; UNDRR also records that the General Assembly resolution was led by Japan and Chile.
United Nations General Assembly
UN General Assembly resolution A/RES/70/203
First documented observance
United Nations records identify 5 November 2016 as the first annual World Tsunami Awareness Day.
United Nations Office for Disaster Risk Reduction (UNDRR)
UNDRR’s official World Tsunami Awareness Day history states that UNDRR facilitates the observance in collaboration with the rest of the United Nations system.
What the evidence establishes
Verified institutional roles and milestones are shown first. Fields that the reviewed sources do not establish remain fail-closed and are available below without competing with the confirmed record.
2 fields not established in reviewed sources
Ways to observe
Find the official tsunami or coastal-hazard information for your area, if applicable, and learn where local evacuation maps are published.
Take part in a recognized drill or preparedness exercise organized by a school, workplace or emergency authority.
Teach the difference between hazard awareness, early warning and evacuation planning.
Use historical case studies to examine what helped or hindered effective warning and response.
Do not rely on generic social-media instructions in place of current local emergency guidance.
Useful facts
World Tsunami Awareness Day is observed on 5 November.
The UN General Assembly designated the day in 2015 through resolution A/RES/70/203.
The date honours the Japanese “Inamura-no-hi” story.
Preparedness advice must be localized because coastlines, warning systems and evacuation routes differ.
The initiative originated in Japan, with Toshihiro Nikai documented by UNDRR as its first proposer.
UNDRR facilitates the global observance in collaboration with the United Nations system.
UNESCO-IOC has a separate technical role in tsunami warning and mitigation systems.
Topic and context
What this page does not assume
- Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
- Do not treat the title alone as proof of government recognition or public-holiday status.
- Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
- Health Information Not Medical Advice.
Evidence & sources
Repeated links from the authority record, institutional provenance and editorial guide research are consolidated here. Badges show how each source is used; a contextual source is never treated as proof of establishment on its own.
UNESCO — World Tsunami Awareness Day (opens in a new tab)
United Nations Digital Library — A/RES/70/203 action record (opens in a new tab)
United Nations General Assembly — Tsunami Awareness Day background and Inamura-no-hi date rationale (opens in a new tab)
United Nations — Secretary-General message on first World Tsunami Awareness Day (opens in a new tab)
United Nations — World Tsunami Awareness Day (opens in a new tab)
United Nations Office for Disaster Risk Reduction — World Tsunami Awareness Day history (opens in a new tab)
United Nations Office for Disaster Risk Reduction — World Tsunami Awareness Day launch (opens in a new tab)
United Nations — List of International Days and Weeks (opens in a new tab)
Show 1 additional source reference
Understand it, compare it, then explore further
Start with the most common factual questions, then use reviewed distinctions and related authority records to understand where this observance fits.
Frequently asked questions
When is World Tsunami Awareness Day?
5 November The stored recurrence guidance is: 5 November.
Does World Tsunami Awareness Day fall on the same date every year?
The authority record classifies it as fixed annual, so its month and day are reusable unless stronger evidence changes the rule.
Is World Tsunami Awareness Day an official public holiday?
The authority record verifies it within this scope: United Nations / international observance. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when the supporting authority record explicitly does so.
Who established or recognizes World Tsunami Awareness Day?
The reviewed provenance layer identifies United Nations General Assembly as the proclaiming or establishing body. The proposer or originator is recorded separately as Japan (initiative first proposed by Toshihiro Nikai). Current facilitation or coordination is recorded as United Nations Office for Disaster Risk Reduction (UNDRR).
Is World Tsunami Awareness Day international or country-specific?
The record has international or global institutional scope: United Nations / international observance. That does not mean every country treats the date as a public holiday or observes it in the same way.
How is this page verified?
The factual layer is source-backed and keeps its date rule, scope, provenance and editorial guardrails attached to the authority record. This record was checked on 2026-09-05.
Why is World Tsunami Awareness Day on 5 November?
The date was chosen in honour of the Japanese “Inamura-no-hi” story, which is associated with warning villagers and moving them to safety during an 1854 tsunami.
When did the United Nations establish the day?
The UN General Assembly designated 5 November as World Tsunami Awareness Day in 2015 through resolution A/RES/70/203.
Does this guide replace local tsunami evacuation instructions?
No. Evacuation routes, alert systems and emergency instructions are location-specific and should come from competent local authorities.
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These records also resolve to November 5, 2026 under the current authority data.
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