Live · I use it

UR check

Save the UR apartment you're looking for and get an email when a matching room opens up — so you don't have to keep refreshing the site.

About

UR rentals in Tokyo go fast, and the official site has no alerts. I kept checking it by hand, so I built a service that checks for me.

You can start with one saved search without signing up. Sign in with Google later and your searches and history come with you.

Saved searches: Area, rent, floor space, layout and walk time across Tokyo, Kanagawa, Chiba, Saitama and Ibaraki.
Scheduled checks: Each search is checked on its own interval between 08:00 and 20:00 JST.
Change-only emails: One summary when you turn alerts on, then only rooms that are new or listed again.
Guest to member: Searches and history move over in one step when you sign in with Google.
History: Every check and every email is listed with its result.

Backend: Java · Spring Boot · Spring MVC · Spring Data JPA · Scheduler
Frontend: React · TypeScript · Vite · TanStack Query · Tailwind CSS
Auth: Spring Security · Entra External ID · Google
Data: PostgreSQL · Flyway
Infra: Azure Container Apps · Container Registry · Key Vault · Terraform · Cloudflare DNS
CI/CD · Ops: Azure Pipelines · Workload Identity Federation · Application Insights

React and Spring ship as one image on a single replica. It keeps the scheduler and sessions simple for a service this size.

Calls to UR and the email service run outside database transactions, so a slow request or a failed email never rolls back a good scan.

If any page fails, the whole check fails and the previous state stays. Better to miss one run than to send a wrong “new room” email.

Not affiliated with UR (Urban Renaissance Agency). Always confirm availability on the official UR site.