The detective in Portopia never moves. He tells Yasu to move, and Yasu comes back with what he found.
Every fact in this case reaches the player second-hand. You do not walk to Shinkaichi; you order Yasu to go, and he reports what is waiting there. You do not examine the body; you tell Yasu to examine it. The man beside you does all of it, and the player sits still and listens for the length of the investigation.
In June 1983 those orders were typed. On the PC-6001 the player wrote them out in Japanese and hoped the game accepted the phrasing. It was Horii's second commercial release, after a tennis game.
The case closes on the man who had been carrying out every order. In Japan that answer is common knowledge now, and the phrase naming the culprit is understood by people who have never touched the game and never intend to. It is one of the few endings in this medium that stopped being a secret and became a piece of the language instead.
When he wrote this game, Yuji Horii was a writer for Weekly Shonen Jump. In 1982 he went to cover an Enix programming contest as a reporter, entered his own tennis game while he was there, and took a prize out of about three hundred entries. He kept writing for the magazine until Dragon Quest III came out.
Adventure games at the time asked you to travel by compass — north, south, east, west. Horii had you type the name of the place instead, and Kobe stopped being a maze and became a list of destinations. On the Famicom, the whole game ran on fourteen commands. It was the work of turning a game into a novel.
Give people fewer things to choose from and the story moves faster. Having every option open looks like freedom, and it can be what keeps you standing still.
About this game
In June 1983 Yuji Horii finished a murder mystery written for NEC's PC-6001, and Enix put it on sale. The player is a detective who gives orders and never acts: every search, every question, every journey across Kobe is carried out by a subordinate named Yasu. Chunsoft converted the game for the Famicom on 29 November 1985, where it is considered the first adventure game on the system. The typing was gone, and the orders had become a menu.
Gallery
The Story Behind
In 1985 the Famicom belonged to action. Platform games, shooters, sports titles. Enix put a murder investigation on it, and the machine turned out to be able to carry one. What had made the original unusual two years earlier was not the puzzles. It was that the story took place in a real city, Kobe and the Portopia exposition district that gave the game its name, and that it was built like a novel, with people who had reasons for what they did.
The hardest problem in the design belonged to the man who had caused it. Horii's free typing was the obstacle. Players knew what they wanted to do and could not find the words the game would accept, so the difficulty moved out of the mystery and into the vocabulary. Later computer versions began assigning the most-used orders, go, examine, alibi, to the function keys. Horii spent the years that followed taking his own idea apart and putting something plainer in its place.
Tricks & Tales
Chunsoft handled the Famicom conversion and did not invent a replacement for typing. The menu system came from Okhotsk ni Kiyu, the computer adventure Horii had made the year before, and it fitted a console with no keyboard.
Some of what typing allowed came back in other forms. A magnifying glass lets the player search the screen itself for evidence. An underground maze is walked with the D-pad, the one stretch of the game where the menu disappears and the player moves directly. Yamakawa's diary and the scene of Yukiko grieving do not exist in the computer version at all.
Horii wrote about games as well as making them. From 1985 he ran the Famicom Shinken column in Weekly Shonen Jump under the pen name Yuutei, so the designer and the reviewer were the same man, on the same newsstand, in front of millions of readers.
Collector's Guide
Region & Compatibility
Released exclusively in Japan for the Famicom, the console sold outside Japan as the NES. The game was never officially localized into English in its original form. A re-release of the PC version with an AI-assisted English translation was made available digitally by Square Enix in October 2022, but the original Famicom cartridge remains Japan-only.
Maintenance Tips
The gold-plated edge connectors on Famicom and NES cartridges pick up skin oils and oxidation over decades — a gentle wipe with a cotton swab dampened in 90% or higher isopropyl alcohol, stroking along the length of the pins rather than across them, is the accepted standard. Let the alcohol fully evaporate before reinserting. The old habit of blowing into a cartridge is folklore: the moisture in breath causes slow corrosion of the contacts over time, and any improvement you felt came from the act of re-seating the cart, not from the breath itself. Nintendo eventually updated its own troubleshooting guidance to say explicitly: do not blow into your Game Paks.
Going deeper
Explore the machine this game ran on, and what to check before you buy or care for one:
What to Watch Out For
Before buying, these are the points worth knowing — from someone who handles original Japanese The Portopia Serial Murder Case copies regularly.
Will this Japanese Famicom cartridge work on a North American Nintendo Entertainment System (NES)?
No, not without an adapter. The Famicom uses a 60-pin edge connector while the NES uses a 72-pin connector with a physically different form factor — the two are incompatible at the cartridge slot level. Third-party adapters exist that bridge the pin difference and allow Famicom cartridges to run in a NES. On a Japanese Famicom, NES cartridges face the same incompatibility in reverse. To play Japanese Famicom software, you need a Japanese Famicom, a Famicom-compatible clone console, or a NES fitted with an appropriate adapter.
How should I clean a Famicom cartridge to ensure reliable play?
Apply 90% or higher isopropyl alcohol to a cotton swab and gently wipe the gold-plated PCB edge contacts on the base of the cartridge. Never blow into the cartridge — breath moisture accelerates contact corrosion over time. If cleaning is needed inside, Famicom cartridges use 3.8mm security game bit screws (not standard Phillips); a security bit screwdriver is required to open the shell without damage. Note that most Famicom boot failures originate in the 60-pin console slot rather than the cartridge itself — cleaning the console slot contacts separately with a contact cleaning tool is often the more effective fix.
Before You Buy
Things worth knowing before you buy The Portopia Serial Murder Case
A short checklist for buying a used Famicom cartridge wisely — useful with any seller, anywhere.
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Choose a seller who tests it before shipping
A copy that has actually been powered on and checked is a known quantity. An untested one is a gamble you only settle after it arrives.
Look for a seller who states it was function-tested and says what they confirmed. A serious seller can tell you exactly what was checked.
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Make sure it fits your console
This is a Japanese Famicom cartridge with a 60-pin connector; a North American NES uses a 72-pin slot, so it will not fit directly.
Play it on a matching Japanese console or a region-free system, and confirm the listing states the region.
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If this title saves your progress, check the battery
Cartridges that save use a small coin-cell battery that fades over decades — a dead one wipes your save without warning.
Ask the seller whether the save function was tested. Replacing the battery is possible, but doing so erases any existing save.
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Check that the contacts are clean
Dirty edge contacts are the most common cause of startup and sound trouble in cartridges of this age.
Choose a seller who cleans the contacts before shipping. A note that it was tested and cleaned means the basics were handled.
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Confirm it is genuine, not a reproduction
Sought-after titles are targets for reproduction boards with replacement labels.
Ask for a photo of the circuit board and look for factory markings. Favour a shop with a licensed second-hand dealer permit (古物商) — by law its stock has a traceable origin, your simplest guard against fakes.
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Read the seller's reviews and return policy
A 100% positive record across thousands of sales is close to a guarantee — packing, communication and problem-solving all work for everyone. A return policy protects you if something is off.
Read the feedback and confirm a clear return window before you buy.
The last step before buying anywhere is knowing what it's worth.
See what we have in stock →Unexpected Discoveries
Games you weren't looking for — but might be glad you found.
Rooms this game lives in
Wander deeper — explore the themed rooms where The Portopia Serial Murder Case sits alongside its kin.
Memories from around the world
This is a young museum, and this page is still waiting for its first voices. The memories people send reach Taisei personally, and the ones that move him find a home here over time — always with the writer's blessing. Yours could be the very first for this game.
Share your memory ↑From the Museum's Screening Room
Portopia — Max Explains