Stop overselling
across your shops.
UriUri is the cross-channel sales OS for solo sellers and small teams. Centralize inventory, orders, shipments and profit across every shop you sell on — so the moment something sells, the rest of your listings get out of the way.
A vintage shirt sells on Mercari Shops. At the same moment, someone's clicked "Add to cart" on the BASE listing. Five minutes before your Yahoo Auctions ends, a different bidder buys it on Creema.
— for the days you don't want to live through again.
One day in the life
K. sells vintage. About 80 orders a month.
The same items go up on Mercari Shops, BASE, Creema, Yahoo Auctions, and the brick-and-mortar shop. Here's what changes once UriUri is in.
Morning. One vintage shirt goes live on 4 channels at once.
One product master. Four listings. Central stock = 1. That's it.
It sells on Mercari Shops.
UriUri pulls the order via API. Central stock drops 1 → 0.
+5 seconds. UriUri reacts.
BASE and Creema get auto-paused via API. A 'needs attention' task lands for Yahoo Auctions.
K. opens UriUri.
Dashboard shows '1 task waiting'. Pause the listing in Yahoo Auctions admin → mark 'done' in UriUri with one tap.
Done.
No oversell. Total time: 13 seconds.
Five minutes before the Yahoo auction ends, a different bidder buys it on Creema. Refund. Apology. ¥4,500 in goodwill discount. One day's profit, gone — quietly.
Core MVP
Focus: stop overselling, clear the unshipped queue, see real margin.
CRM, accounting and analytics aren't the headline. The day-to-day selling loop is.
Single product master
One canonical product, mapped to listings on every channel.
Central inventory
One quantity, anywhere it sells. Decrements the moment a sale lands.
Channel listings
See exactly which products are live where: Mercari Shops, BASE, Shopify, Creema, minne.
Order management
Manual entries and API pulls in one queue. Revenue, fees and shipping in one row.
Pause tasks
Channels we can't pause via API get a clear 'pause this listing now' task.
Real margin
Subtract fees, shipping and cost basis from revenue. See per-product, per-channel margin.
Channel policy
Auto-sync the channels we can. Surface a clear pause task for the rest.
We don't claim 13-channel realtime sync. We split API channels from manual channels and prevent overselling pragmatically.
API channels
Auto-synced
Mercari Shops / BASE / Shopify / Rakuten / Yahoo! Shopping / Amazon
Order pulls, inventory updates and listing creation are automated through each channel's official API.
Manual channels
Pause-task supported
Creema / minne / Yahoo Auctions / Rakuma / Mercari (C2C) / Yahoo Flea / In-person
No unofficial scraping. After a sale on another channel, we surface the listing you need to pause and you confirm with one tap.
Why UriUri
If something else fits, just use that.
Spreadsheets are fine until they aren't. Big multi-channel SaaS is fine until your monthly bill exceeds your monthly revenue. UriUri sits in the gap between those.
| Capability | Spreadsheet | Big SaaS | UriUri |
|---|---|---|---|
Auto-pause other channels on sale | |||
Manual channels (no public API) supported Yahoo Auctions, Creema, minne handled via tasks + 1-tap done | |||
UX optimized for one-of-a-kind / low-quantity | |||
True margin (after fees, shipping, cost basis) | |||
Monthly cost (solo seller scale) ¥0 – ¥4,980 / mo | |||
Lightweight to onboard |
Note: "Big SaaS" here means the established Japanese multi-channel tools (NextEngine, TEMPOSTAR, CROSS MALL, GoQSystem). If you do 1,000+ orders / month, those are probably a better fit.
Screens
What you actually look at: products, stock, orders, profit.
The first-run experience prioritizes day-to-day selling, not boardroom dashboards.
Products & central stock
Per-product price, cost, stock and live listings.
Revenue & margin
Revenue minus fees, shipping and cost basis.
Who it's for
Sellers running the same stock across multiple shops.
Not 'small EC in general' — sellers with one-of-a-kind or low-quantity items spread across many storefronts.
Vintage & secondhand sellers
Antique & resale dealers
Handmade artisans
Small DTC brands
Plant & rare-cultivar sellers
FAQ
Common questions
What we automate, what stays manual, and how we treat both honestly.
Who is UriUri for?
Are all 13 channels auto-synced?
How is this different from a spreadsheet?
Is UriUri an accounting tool?
Does it work for plant sellers?
Start by stopping the next oversell.
Closed Beta is live. We're polishing UriUri alongside the people running real cross-channel shops.
from the maker
I sell vintage and plants across multiple shops myself. I got stuck in the oversell → refund → goodwill discount loop more times than I'd like to admit. This is the tool I wish I'd had.
It's not perfect. Beta will have rough edges. But UriUri gets sharper when real sellers shape it with me.
— Kohei