The Most Terrifying Technology in Restaurant to Another World Is the Front Door
Restaurant to Another World has one of those wonderfully simple anime premises that becomes increasingly insane the longer you think about it.
Western Restaurant Nekoya is an otherwise ordinary Japanese restaurant. Six days a week, it serves ordinary Japanese customers. But every Saturday, when the restaurant is supposedly closed, mysterious doors bearing its familiar cat emblem appear throughout another world.
Open one, and instead of whatever should be on the other side, you enter Nekoya.
The patrons are elves, dwarves, warriors, mages, demons, princesses, adventurers, and dragons. They come from different countries and cultures, sometimes separated by enormous distances. Yet all their doors lead to exactly the same place: the same entrance inside a small Japanese restaurant.
The anime is primarily interested in what happens next.
They eat.
And that's charming. A fantasy-world inhabitant discovering curry, fried shrimp or chocolate parfait can apparently experience something approaching religious revelation.
But after watching several episodes, I have become increasingly convinced that everyone in this series is paying attention to the wrong thing.
Forget the curry.
Someone has created an interdimensional transportation network that casually violates several laws of physics, nobody has the faintest idea how it works, and everyone is using it to get lunch.
It Isn't the Restaurant That Travels
Nekoya doesn't appear in the fantasy world.
The doors do.
There can apparently be numerous doors scattered throughout the other world simultaneously, despite all of them opening onto the same fixed doorway inside Nekoya.
Already, that's extraordinary.
Suppose there are doors in locations A, B and C.
We apparently have:
A → Nekoya
B → Nekoya
C → Nekoya
Three geographically separated points map onto one physical location.
That's not simply teleportation. That's a network.
But then the show introduces Kuro.
And everything gets considerably more ridiculous.
There's a Door on the Freaking Moon
And by “isolated herself,” I don't mean that she moved into a cave in the mountains.
She lives on the moon.
Not some metaphorical magical realm called “the Moon,” either. The anime shows us an apparently barren, cratered astronomical body orbiting the fantasy planet.
Actually, “moon” may be underselling its condition.
Something has apparently blown away a substantial portion of it.
The image we see depicts a catastrophically damaged moon surrounded by enormous fragments of debris. It looks as though perhaps a quarter to a third of the original body is missing.
Incidentally, the fact that the remaining moon continues orbiting isn't particularly objectionable physics. Newton is perfectly comfortable with a moon suddenly becoming substantially less massive. Assuming the catastrophe didn't dramatically alter the velocity of the remaining body, it would initially continue along approximately the same orbit.
The debris field would be another matter. Over time we'd expect impacts, ejections, reaccretion and potentially the formation of rings or other orbital structures.
But those are minor details compared with what happens next.
Because somehow, on this shattered, apparently airless moon: a Nekoya door appears.
Apparently the mysterious interdimensional restaurant network has an extraterrestrial coverage plan.
And Nobody Gets Sucked Through It
Kuro opens the door.
On one side:
vacuum.
On the other:
a comfortable Japanese restaurant at roughly one atmosphere.
Nothing happens.
There is no violent rush of air.
Napkins don't go flying.
Plates don't disappear through the entrance.
Customers aren't suddenly reconsidering their lunch while experiencing explosive decompression.
Kuro simply walks inside.
That means the doorway almost certainly isn't an ordinary traversable wormhole in the science-fiction sense of two regions of space being made locally contiguous.
If it were, opening the door should connect the atmospheres.
Instead, something is maintaining the environmental conditions on either side.
Conceptually, we don't have:
Moon ← open passage → Nekoya
We have something more like:
Moon → [UNKNOWN SYSTEM] → Nekoya
And that unknown middle layer is doing an extraordinary amount of work.
The Door Is Apparently Selective About Matter
Think about what the Kuro scene implies.
Vacuum doesn't “flow” into the restaurant because vacuum isn't anything. But Nekoya's atmosphere certainly should flow out.
It doesn't.
Yet Kuro can cross.
So apparently matter doesn't cross the boundary merely because a pressure gradient exists. Something must actually traverse the portal.
Which immediately makes me want to perform experiments that would probably get me permanently banned from Nekoya.
Open Kuro's lunar door and put a fan in front of it.
Does air cross?
Blow smoke through it.
Throw a ball.
Pour water through it.
Stick your arm through.
And, most importantly, run a rope through the doorway.
Could half the rope remain inside Nekoya while the other half exists on the moon?
If so, congratulations: we have established a physically continuous traversable portal that somehow isolates atmospheric pressure.
If not, something even stranger is happening.
Unfortunately, everyone is too busy ordering beef stew to conduct basic experimental physics.
Then There's the Return Trip
There's another question the show conveniently avoids emphasizing.
We routinely see patrons arriving through the door. But the mechanics of their departure aren't explored with anything approaching the rigor that a group of curious software engineers would inflict upon the system.
We naturally assume that everyone returns to wherever they entered.
But think about what that requires.
Alice enters through Door A.
Bob enters through Door B.
Both arrive through the same physical doorway inside Nekoya.
Alice finishes eating and leaves.
Presumably:
Alice → A
Bob then leaves through precisely the same door:
Bob → B
If that's how it works, the system is stateful.
It has somehow remembered where each customer came from.
Which means somewhere in whatever passes for the door's routing system is effectively:
ALICE → A
BOB → B
KURO → THE FREAKING MOON
And now we're no longer talking about teleportation coordinates.
We're talking about identity.
Who Opens the Door?
Here's where the software engineer in me starts writing test cases.
Suppose Alice came from A and Bob came from B.
Alice opens Nekoya's door.
Bob walks through it.
Where does Bob go?
There are several possibilities.
Perhaps the destination is determined by whoever opens the door. Alice opened it, therefore Bob arrives at A.
Perhaps it is determined by whoever crosses the threshold. Bob crosses, therefore he returns to B.
Or perhaps every patron receives an invisible “return address” upon entering Nekoya, and the door simply reads that information when the person leaves.
The latter possibilities seem more likely because otherwise something as mundane as holding the door open becomes potentially catastrophic.
Imagine the waitress politely holding the door while several customers leave.
One belongs in a castle.
Another belongs in a dwarven mine.
Another belongs in a distant forest.
Kuro belongs on the moon.
If the person operating the doorknob determines the destination, restaurant etiquette suddenly becomes an interdimensional transportation hazard.
Now Make the Test Nastier
Alice opens the door.
Bob puts only his arm through.
Where is Bob's hand?
If Bob's return address determines the destination, his hand should theoretically emerge through Door B while the rest of him remains in Japan.
Now Alice grabs Bob's arm and follows him.
Where does Alice emerge?
And what happens if Alice and Bob, who entered through different doors, hold hands and cross the threshold simultaneously?
These aren't frivolous questions.
They distinguish radically different models of how the system works.
The door might route individuals.
It might route whatever object first intersects the portal.
It might establish a temporary connection when opened.
It might recognize conscious entities.
Or the entire premise might operate according to rules so alien that concepts such as “location” and “object” aren't even appropriate.
We don't know.
More importantly:
Nobody in the story seems to know either.
But What Does the Open Door Actually Show?
There is one more problem with all of these models.
When Nekoya’s door is open, we can see the landscape on the other side.
That seemingly innocuous visual detail rules out one convenient explanation: the external endpoint cannot simply remain undefined until someone crosses the threshold. The portal has already established some connection before the traveler passes through it.
Which brings us back to Alice and Bob.
Alice entered Nekoya through a door beside her castle.
Bob entered through another door in a distant forest.
They're both sitting inside the restaurant.
Alice finishes first and opens Nekoya’s door.
What landscape do we see?
Presumably, her castle.
But now Alice walks through and Bob catches the door before it closes.
What happens?
Does Bob emerge at Alice’s castle?
Does the landscape suddenly change to Bob’s forest as he approaches?
Does the door refuse to work for Bob?
Or—and this would be considerably stranger—does Alice see her castle through the doorway while Bob sees his forest through the same physical opening?
By episode eight, the series has given us one useful piece of negative evidence: nobody seems to end up in the wrong place.
No patron has opened the door, looked outside and exclaimed, “This isn’t where I came from.”
Considering how geographically scattered Nekoya’s clientele is—and that one of those destinations is the freaking moon—we would expect incorrect routing to become spectacularly obvious.
So whatever the mechanism is, it apparently works reliably.
There may be a wonderfully mundane explanation for why we never see the ambiguous case: people close doors behind themselves.
Perhaps every open-close cycle is effectively one portal transaction:
Door closed → destination selected → door opens → traveler crosses → door closes.
Then the next patron initiates an entirely new connection.
Nobody needs to understand this. It could simply emerge naturally from ordinary door etiquette.
But that gives us the perfect experiment.
Alice opens the door and walks through.
Before it closes, Bob catches it with his hand.
At that moment, we'd learn an enormous amount about how Nekoya actually works.
Unfortunately, nobody in this restaurant seems remotely interested in experimental physics.
I Want a Salaryman to Be Sitting There
There is one scene I desperately want the series to give me.
Not a Japanese customer deliberately discovering the other world. Nothing that dramatic.
Just a completely ordinary Japanese salaryman who happens to be sitting at Nekoya after work.
Tie loosened. Jacket hanging over the back of his chair. Sake in one hand. Perhaps some fried food in front of him. He has had a long day and is trying very hard not to think about tomorrow.
Then the door opens.
And a seven-foot-tall lizardman walks in.
Or a lion-headed gladiator.
Or an elf.
Or Kuro.
The salaryman slowly lowers his sake.
The fantasy patron stops in the doorway.
They stare at each other.
Because the beautiful thing about this encounter is that both of them have perfectly reasonable reasons to think the other one shouldn't be there.
The salaryman knows Nekoya as a perfectly ordinary neighborhood restaurant. He may have been eating there for years. There has never been anything particularly remarkable about it.
And the fantasy patron knows Nekoya as the mysterious restaurant from another world that appears once every seven days.
Neither has any reason to suspect that there is a third party.
Imagine the conversation.
“What are you?”
“I'm from Accounting.”
That doesn't really answer the question for either of them.
The lizardman might assume the salaryman is some strange local inhabitant of the mysterious world from which Nekoya originates. Which, technically, he is.
The salaryman has the considerably more difficult problem of explaining why a giant armed reptile has just walked through the restaurant door and why the owner doesn't seem particularly concerned about it.
And that's the part I'd particularly enjoy.
The owner wouldn't scream.
He wouldn't run.
He'd probably just look up and say something along the lines of:
“Welcome. Your usual?”
And now our poor salaryman has to reconsider everything he thought he knew about the little restaurant where he occasionally drinks after work.
But the encounter would also answer one of the biggest questions we've been discussing.
Can both networks operate simultaneously?
We know Nekoya has its mundane Japanese entrance and its collection of mysterious otherworldly entrances. The fantasy patrons normally visit on the restaurant's day off, neatly preventing the two customer populations from colliding.
But is that separation a rule of the portal?
Or merely the owner's schedule?
If it's merely scheduling, then nothing supernatural prevents this encounter. Open Nekoya to ordinary Japanese customers on Saturday and, theoretically, you could have an office worker eating beside an elf, a dwarf, a demon and an ancient dragon.
And then someone is eventually going to ask the dangerous question:
“Where did you come from?”
Because that's when the restaurant stops being merely a meeting place and becomes the site of first contact between two civilizations.
Not through governments.
Not through scientists.
Not through explorers.
Through two guys sitting at adjacent tables, each increasingly convinced that the other has been drinking considerably more than he has.
And somewhere behind the counter, the owner is still trying to get their orders out before the croquettes get cold.
Who Built This Thing?
Nobody appears to truly understand where the doors came from or how the system operates.
Why do they appear every seven days?
Why do all of them terminate at Nekoya?
What determines where a new door appears?
How far can the network reach?
Does it connect planets?
Solar systems?
Universes?
Why does it maintain different atmospheric conditions?
How does it determine return destinations?
And why, of all possible places, does the network terminate in a Japanese restaurant?
We naturally assume that Nekoya is the purpose of the system because that's where the story takes place.
But that doesn't necessarily follow.
Perhaps the restaurant simply happens to occupy one endpoint of something vastly older.
Imagine humanity discovering an ancient alien Stargate and, instead of studying it, someone's grandfather builds a restaurant around it.
Three generations later:
“Yeah, weird people come through the door on Saturdays. Grandpa mentioned something about it. Anyway, would you like rice with that?”
Or Maybe the Doors Don't Choose Places
Kuro creates another possibility.
Before her appearance, one could reasonably hypothesize that the doors manifest near civilizations.
Perhaps they're drawn to settlements.
Perhaps some ancient magic created connections between populated regions.
Then a door appears on the moon.
Kuro deliberately chose that location precisely because ordinary people couldn't reach her.
So either a door randomly appeared on an enormous barren astronomical body and Kuro happened to find it—which would be an extraordinary coincidence—or the door didn't choose the moon at all.
It chose Kuro.
That changes everything.
Perhaps the system identifies potential customers.
A door doesn't appear at coordinates X,Y,Z.
It appears somewhere accessible to a particular person.
That would also elegantly solve the return-address problem. If the system can identify Kuro well enough to place an entrance near her, recognizing her when she leaves Nekoya isn't much of an additional requirement.
The network may not be location-aware.
It may be customer-aware.
Which raises the slightly disturbing question of what intelligence—or mechanism—is deciding who qualifies for restaurant access.
Everyone Is Studying the Wrong Miracle
The show presents us with extraordinary fantasy beings discovering mundane products of modern civilization.
To them, the miracle is the food.
And that makes sense from their perspective. They don't understand refrigeration, modern agriculture, global supply chains, selective breeding, industrial food processing or the thousands of accumulated innovations required to put an inexpensive plate of curry on a table.
But sitting a few meters away from that curry is something vastly stranger.
A door that apparently:
- connects different universes;
- creates multiple entrances leading to one fixed destination;
- operates over intercontinental and apparently interplanetary distances;
- functions in vacuum;
- isolates radically different environmental conditions;
- potentially recognizes individual travelers;
- remembers or reconstructs their points of origin;
- dynamically creates endpoints;
- and may actually select its users.
Nobody knows who created it.
Nobody understands how it works.
Nobody knows what its limits are.
And nobody seems particularly interested in finding out.
Because the chocolate parfait is really good.
Perhaps that's the most believable thing about Restaurant to Another World after all.
Human beings could discover a machine that violates everything we understand about spacetime, spend twenty minutes arguing about how it works...
…and then someone would notice that it also makes excellent coffee.
Research suspended until after dessert.
Comments
Post a Comment