Imagine one person moves into a neighborhood. – Nothing really changes.
Imagine ten people move in. – Things are still manageable.
Imagine one famous actress posts:
“I found this hidden neighborhood in Tokyo. It’s peaceful, authentic, beautiful.”
Millions of people see it.
Thousands save the post.
Hundreds decide to visit.
Dozens end up buying property.
Each individual decision is rational. No one intended to destroy the neighborhood.
But together, they end up doing just that.
The Collective Action Problem
This is a classic example of a systems problem.
Every individual asks:
“Why shouldn’t I move here? I’m only one person.”
But a thousand people are asking themselves the same thing.
This is similar to:
- traffic congestion,
- overtourism,
- overfishing,
- social media virality,
- AI energy consumption.
Individual choices add up to create bigger, systemic outcomes.
The UX Butterfly Effect
The first person is not responsible.
The second person is not responsible.
The influencer is not entirely responsible.
The city government is not entirely responsible.
Real estate investors are not entirely responsible.
But together, they create an outcome no one planned.
That’s exactly why this becomes a design problem.
Community as an Ecosystem
What gives a neighborhood its value?
People often say:
- beautiful streets
- quiet atmosphere
- local restaurants
- traditional festivals
- friendly neighbors
But those things are just the results.
The real system looks more like this:
Long-term residents
- Neighborhood relationships
- Volunteer culture
- Festivals and traditions
- Community identity
- People want to live there
Ironically enough,
- People want to live there
- Demand increases
- Prices increase
- Long-term residents leave
- Volunteer culture weakens
- Festivals disappear
- Community identity disappears
The very thing that drew people in gets ruined by its own popularity
Social Media as an Accelerator
Before social media:
Word of mouth used to spread slowly.
Neighborhoods would change gradually, over decades.
Now:
One celebrity.
One TikTok.
One RED note.
One Instagram Reel.
One YouTube video.
Suddenly, thousands of people know about a place all at once.
Information now spreads much faster than a community can adapt.
Consumption vs Stewardship
This is where your idea gets really interesting, in my view.
Many newcomers see the neighborhood as a product.
Nice café.
Nice festival.
Nice atmosphere.
But longtime residents see it differently.
They know:
• who cleans the shrine,
• who organizes the matsuri,
• who visits elderly neighbors,
• who cleans the park,
• who attends disaster drills,
• who runs the children’s activities.
What you see in the culture depends on work that often goes unnoticed.
If many newcomers just enjoy the benefits without helping to maintain them, the whole system slowly falls apart.
This Isn’t About Nationality
The same thing happens with:
• wealthy Tokyo residents moving to Kamakura,
• Americans moving to Lisbon,
• digital nomads moving to Bali,
• retirees moving to rural villages,
• tourists converting homes into Airbnb rentals.
The pattern is always pretty much the same.
So the real conversation should be about participation, not ethnicity.
HCD Misses Something
Traditional Human-Centered Design asks:
What does the user want?
The newcomer wants:
• affordable housing,
• beautiful streets,
• great restaurants,
• local culture.
So, by that measure, the design works.
But who is the user?
What about:
• the 80-year-old woman who has lived there for 50 years?
• the child who will inherit the neighborhood?
• the volunteer who has run the festival for 30 years?
• the local shopkeeper?
But their experiences are rarely taken into account.
