Not another listings site
Track every property you’re considering — not just the one you buy
Japan Property OS is where you organize the properties you’ve already found, run the numbers, work through Japan-specific due diligence, and decide with a real Suitability Score — whether you found the listing on Suumo, Akiya Japan, Old Houses Japan, or anywhere else.
First property free. Then $19.99/month. Cancel anytime.
Gather
Paste a listing URL, we pull the details.
Track
Your own pipeline, from first look to purchase.
Diligence
A Japan-specific checklist, not a generic one.
Analyze
Real yield, cash flow, and ROI, computed for you.
We don't list akiya. We help you decide.
Sites like Suumo, Akiya Japan, and Old Houses Japan are great at showing you what's out there. None of them help once you've found four candidates and need to actually compare them, run the numbers, and keep track of what still needs checking. That's the part we built.
Everything after you find a listing
Gather data from any listing
Paste a URL from Suumo, Akiya Japan, Akiya2.0, Old Houses Japan, or anywhere else — we pull in the address, size, price, and photos automatically, so you're not retyping listing details by hand.
Your own pipeline, not theirs
A simple board to track where each property actually stands for you: Tracking, Interested, Not Interested, Offer Submitted, Negotiating, Under Contract, Purchased. Drag a card when something changes.
Japan-specific due diligence
A curated checklist covering legal, structural, seismic, flood risk, and akiya-specific concerns most first-time international buyers wouldn't know to check for.
Real financial analysis
Surface yield, real yield, cash flow, ROI, and payback period for investment properties — or a straightforward total-cost view for a personal home.
A Suitability Score built around you
Answer a few questions about what you're actually looking for, and every property gets a personalized score with a plain-language rationale — grounded in your own criteria, not a generic algorithm.
Side-by-side comparison
Put up to four properties next to each other, down to the individual due-diligence item, to see which one actually holds up once you look closely.
Documents, notes & questions
Keep contracts, inspection reports, and every question you asked your agent attached to the property they're about — not scattered across email threads.
Built in English & Japanese
Every screen works in both languages, switchable any time from the header — for you, or for anyone you're working with locally.
New to buying property in Japan?
You don't need to have it all figured out first. Add the first property you're considering — due diligence, financials, and comparison come together as you go, not before you start.
One workspace for every property you're seriously considering — not four browser tabs and a spreadsheet.
How it works
Add a property
From any listing URL, or start from scratch.
Work through it
Due diligence, financials, documents, questions — all in one place.
Compare your top picks
Side-by-side, down to the detail that actually matters.
Decide with confidence
Backed by your own numbers, not a listing agent's pitch.
Have a question?
Do you list properties for sale?
No. We're not a listings marketplace — there are already good ones for that (Suumo, Akiya Japan, Old Houses Japan, and others). Japan Property OS is where you track and evaluate the properties you've found from any of those sources, in one organized place.
Is my data private?
Yes — your workspace is private. Everything you add — properties, documents, financial figures, notes — is private to your workspace and is not visible to other Japan Property OS users. We never sell your information. Necessary service providers (like hosting and payment processing) may process some of it to help us run the app — see our Privacy Policy for the full details.
Do I need to be a real estate investor to use this?
No. It's built for both — someone buying a single home for themselves, and someone evaluating multiple investment properties at once. The due diligence checklist and financial tools adjust to which one applies.
How does the Suitability Score work?
You answer a short set of questions about what you're looking for — location, budget, renovation appetite, and more. Every property you add is then scored against your own answers, with a written explanation of why it does or doesn't fit.
What languages does it support?
English and Japanese, fully, switchable at any time — not just a translated homepage.
Is this ready to use today?
It's in active early use — the core workflow (tracking, due diligence, financials, comparison, Suitability Score) is built and working. If something looks rough around the edges, that's honest: we're still building.