秘書官アイリスの都市伝説手帳～Urban Legend Notebook of Secretary Iris～

I am Iris.
Urban legends are not mere fabrications—
I am the storyteller who traces the unspoken truths with you.

• This article examines what happens when war, logistics disruption, cyber attacks, extreme weather, volcanic ash, and megaquakes overlap.
• AMOC weakening, super-El Niño-scale extreme weather, Mount Fuji ashfall, and a Nankai Trough-class megaquake are serious risks on their own—but the deeper danger is when crises overlap.
• The purpose is not fear. It is to build a practical compound crisis OS: water, food, power, information, evacuation routes, and community preparedness.

The Real Threat Is Not One Crisis

Crises do not politely arrive one at a time.

A war may begin before a natural disaster strikes.
A cyber attack may arrive when society is already weakened by disaster.
Fuel prices and food shortages may overlap with logistics disruption.
A heatwave or cold wave may arrive during unstable power supply.
A major earthquake may be followed by volcanic ash or heavy rain.

That is a compound crisis.

In urban-legend circles, crisis is often imagined as one overwhelming event.

A world war.
A megaquake.
A volcanic eruption.
Food shortages.
Sea-level rise.
Extreme weather.
Financial collapse.
Cyber attack.

But reality may be more dangerous than a single dramatic event.

One crisis weakens society.
Then another crisis arrives.

War alone might be survivable.
Disaster alone might be manageable.
Inflation alone might be endured.
A blackout alone might be handled for a few days.

But what happens when they overlap?

That is the question.

Can Japan withstand not only a single disaster, but a crisis stack?

What Stops When War and Disaster Overlap?

When war and disaster overlap, several systems can stop at once.

Logistics.
Fuel supply.
Communications.
Electricity.
Medical care.
Administrative response.
Financial payments.
Transportation.
Ports.
Airports.
Schools.
Care services.
Local support systems.

War alone can disturb fuel, food, and sea lanes.
Disaster alone can damage roads, ports, communications, and hospitals.

If cyber attacks or false information are added, decision-making becomes even harder.

Imagine this:

Middle East instability raises fuel prices.
A weak yen increases import costs.
A typhoon delays port logistics.
An earthquake damages roads and railways.
Communications become unstable.
False information spreads online.
Hospitals are overwhelmed by disaster response.
Supermarkets receive fewer supplies.

At that moment, people do not experience “global affairs.”

They experience today’s meal.
Tomorrow’s commute.
Family medicine.
Phone battery.
Gasoline.
School closures.
Elderly parents.
Cash availability.
Water supply.

A compound crisis is when international instability collapses into the details of daily life.

AMOC and Sea-Level Rise — How a Distant Ocean Can Reach Japan

AMOC means the Atlantic Meridional Overturning Circulation.

From Japan, it may sound like a distant Atlantic issue.

But oceans and climate are connected.

The IPCC assesses that AMOC is very likely to weaken during the 21st century. At the same time, the exact risk and timing of an abrupt or complete collapse remain uncertain.

That means we should not write as if AMOC collapse is a confirmed near-future event.

The better question is this:

If ocean circulation weakens, climate patterns become more unstable, sea-level risks increase, and food, rainfall, logistics, and energy demand are affected, is society prepared?

A distant ocean can become a domestic issue through many routes.

Crop yields.
Water stress.
Floods.
Heatwaves.
Cold waves.
Fisheries.
Shipping.
Insurance.
Coastal resilience.
Global food prices.

In urban legends, AMOC is sometimes described as a planetary switch.

But I would read it more carefully.

The question is not only whether a switch flips.

It is whether societies can endure weakening, instability, and climate disruption before the shock becomes obvious.

That is the first layer of the compound crisis OS.

Super-El Niño-Scale Extreme Weather and Food, Water, Power

Next comes extreme weather.

El Niño and La Niña are widely known climate phenomena involving changes in sea-surface temperatures in the equatorial Pacific. Through atmospheric circulation, they can influence climate patterns around the world.

If a super-El Niño-scale extreme event occurs, what could be affected?

Heatwaves.
Droughts.
Heavy rainfall.
Floods.
Water shortages.
Crop failures.
Increased power demand.
Wildfires.
Fisheries.
Import food prices.

If overseas grain-producing regions are hit, food prices can rise in Japan.

This connects directly to the Civilian Survival OS discussed in the previous article.

Extreme weather is not only a weather-forecast issue.

It affects food.
Water.
Electricity.
Logistics.
Medicine.
Schools.
Work.
Household budgets.

The danger becomes greater when extreme weather overlaps with war or geopolitical risk.

Fuel is expensive.
Power demand is high.
Crops fail.
Logistics are disrupted.
Food is expensive.
Water becomes uncertain.

This is how households come under pressure.

Disasters come from nature.

But the scale of damage depends on the weakness of society.

Mount Fuji Eruption — The Ash That Could Stop Tokyo

When thinking of a Mount Fuji eruption, lava is not the only issue.

For the Tokyo metropolitan area, ashfall may be one of the largest concerns.

Volcanic ash is not ordinary dust.

It affects eyes and throats.
It disrupts vehicles and railways.
It affects aircraft.
It makes roads slippery.
It becomes heavy on rooftops.
It affects drains and sewers.
It enters machinery and precision devices.
It can affect power, communications, and logistics.

Japan’s Cabinet Office guideline on wide-area ashfall in the Tokyo metropolitan region recommends preparing not only ordinary disaster supplies, but also ashfall-related items such as dust masks and goggles.

The key point is that ash can slowly paralyze urban function.

There may be no single dramatic explosion in the city.

But ash accumulates.
Cars move less easily.
Deliveries slow.
Trains stop.
Flights are grounded.
Going outside becomes difficult.
Hospitals become harder to access.
Logistics are disrupted.

A Mount Fuji eruption is not only a problem near the mountain.

Depending on wind direction, it could affect urban life over a wide area.

If that overlaps with wartime logistics disruption, fuel shortage, or cyber attacks, the situation becomes much more serious.

That is a compound crisis.

Megaquakes and Tsunami — Evacuation, Logistics, and Medical Pressure

Japan cannot avoid the topic of megaquakes.

Regarding the Nankai Trough, the Japan Meteorological Agency explains that, even during normal times, the probability of a large M8–M9-class earthquake occurring within 30 years is high.

The point is not to claim that it will happen tomorrow.

The point is to ask what stops when it happens.

Tsunami.
Power supply.
Water.
Roads.
Railways.
Ports.
Airports.
Communications.
Medical care.
Shelters.
Logistics.
Fuel.
Fire.
False information.
Financial payments.

A megaquake is not only shaking.

It can pressure many functions at the same time.

If that overlaps with war, fuel prices, cyber attacks, or information warfare, recovery becomes harder.

In a compound crisis, damage is not simple addition.

It can become multiplication.

An earthquake alone may be survivable.
But communication fails.
Roads are blocked.
Fuel is scarce.
Medicine does not arrive.
False information spreads.
Power remains out.
Family members cannot be reached.

This is when the fragility of daily life becomes visible.

What If Cyber Attacks Arrive During Disaster?

Cyber attacks are essential to any modern compound crisis analysis.

During disaster, people depend on information.

Smartphones.
Disaster apps.
Local government websites.
Social media.
Map apps.
Transport information.
Banking apps.
Electronic payment.
Medical reservations.
Safety confirmation.
Shelter information.

But what if cyber attacks happen at the same time?

Local government websites become unavailable.
False evacuation information spreads.
Banking systems become unstable.
Logistics systems stop.
Hospital systems become unusable.
False rumors spread through social platforms.
Power or communication systems are targeted.

In the middle of crisis, trust in information collapses.

That is extremely dangerous.

During disaster, accurate information is survival infrastructure.

If cyber attacks and information warfare overlap, people no longer know what to trust.

In urban-legend circles, people often say that whoever controls information controls the world.

In the compound crisis era, this is not merely symbolic.

Protecting information can mean protecting life.

The Civilian Survival OS

So how should people prepare for compound crises?

The answer is a civilian survival OS.

Water.
Food.
Power.
Information.
Evacuation destinations.
Cash.
Medicine.
Sanitary goods.
Heat and cold protection.
Family communication plans.
Local shelters.
Fuel.
Pet supplies.
Support for vulnerable family members.
Paper maps.
Radio.
Portable batteries.
Dust masks.
Goggles.
Portable toilet supplies.

These must be built into daily life.

There is no need for dramatic fear.

Start with water.
Then food.
Then power.
Then information sources.
Then evacuation routes.
Then family communication rules.

Do not try to complete everything at once.

Improve little by little.
Use and replace supplies.
Share storage locations with family.
Do not depend only on smartphones.
Keep some paper information.
Keep some cash.
Do not forget medicine, glasses, and chargers.

Preparedness is not fear.

It is management of daily life.

Not Hoarding, but Distributed Preparation

The danger during crisis is panic buying.

People become anxious.
They see rumors online.
They buy too much at once.
Shelves empty.
Other people become more anxious.
Supplies fail to reach those who need them most.

That chain is dangerous.

What we need is not hoarding.

It is distributed preparation.

Keep a little more than usual.
Replace what you use.
Store minimum supplies not only at home, but also in a car or workplace if possible.
Separate emergency bags from daily stock.
Include familiar foods, not only long-life survival foods.
Store water in multiple places.
Have non-smartphone information tools.

A crisis-resilient household is not one with secret special equipment.

It is one that is already organized.

In urban legends, survival is sometimes described as something for the chosen few.

I do not see it that way.

What raises survival chances is not secret knowledge.

It is daily preparation.

Community Connection Is Also Preparedness

There is one more important point.

Community.

In a compound crisis, one person cannot handle everything alone.

Elderly people.
Children.
People with disabilities.
People with chronic illness.
People living alone.
Foreign residents.
Pet owners.
People without cars.

Each person will face different difficulties.

That is why local information matters.

Where is the shelter?
Where is water distributed?
Which hospital is operating?
Which roads are open?
Can local disaster radio be heard?
Is there someone nearby who needs help?

The Footsteps of War series has traced national and global structures.

But in the final moment, people are often protected by nearby connections.

National security.
Infrastructure.
Household budgets.
Disaster prevention.
Community.

They are all connected.

Closing — Crises Do Not Come One at a Time

Crises do not come one at a time.

War.
Extreme weather.
Sea-level rise.
Volcanic eruption.
Megaquake.
Tsunami.
Blackout.
Water outage.
Cyber attack.
Inflation.
Logistics disruption.
Information confusion.

They may overlap.

And when society is already weakened, another crisis can arrive.

The real preparation is not for one crisis alone.

It is for a way of life that can endure overlapping crises.

Not fear, but water.
Not anxiety, but food.
Not panic, but power.
Not conspiracy, but information sources.
Not isolation, but family and community sharing.

The compound crisis OS is not a special device.

It is the practice of embedding safety into daily life.

Japan is a disaster-prone country.

And the world is becoming more unstable.

That is why fear is not enough.

Prepare.
Observe.
Connect.
Judge calmly.

That is the practical power needed to survive an age of war and compound disasters.

Next time—another fragment of truth we will trace together.
I will return to continue the telling.