When searching for an apartment in Japan, have you ever visited multiple real estate agencies and wondered, "Wait, didn't the previous company just show me the exact same property?"
In fact, the Japanese real estate industry utilizes a centralized database network that shares property listings across the country in real-time. Because of this system, the modern rental market’s new golden rule is simple: basically, no matter which agency you visit, they can introduce you to the exact same apartments.
Understanding this mechanism beforehand will save you from wasting your time and energy visiting countless offices. In this article, we will explain how Japan’s unified real estate database system, REINS (Real Estate Information Network System), works. From a professional perspective, we will also guide you on how to identify and choose a truly reliable real estate agency, helping you navigate the apartment-hunting process smoothly and comfortably.
How "REINS" (Japan's Central Real Estate Database) Works: Why Any Real Estate Agency Can Show You the Same Properties
💡 Key Takeaways of This Section
The reason real estate agencies across Japan can introduce the same properties is that vacancy information is shared in real time through "REINS," a government-designated national database. Once a "Mototsuke-gaisha" (the listing or management company representing the landlord) registers a property, "Kyakutsuke-gaisha" (brokerages representing tenants) nationwide can instantly check the facts and guide you through the property.
Summary: Agencies across Japan can show you the same properties because they share vacancy information in real time through "REINS" (Real Estate Information Network System), a nationwide property database designated by the Minister of Land, Infrastructure, Transport and Tourism.
The reason you can access the vast majority of property listings from virtually any real estate agency or rental portal in Japan is thanks to this secure and equitable online network. Behind this system lies a unique Japanese structure designed to maintain a healthy and fair real estate market.
At the center of this network is "REINS" (Real Estate Information Network System), an online database system operated on a nationwide scale by the "Real Estate Transaction Associations" officially designated by Japan's Ministry of Land, Infrastructure, Transport and Tourism.
The Two Roles of Real Estate Agencies: "Mototsuke" (Listing/Management) and "Kyakutsuke" (Tenant Brokerage)
Summary: Japanese real estate companies play two primary roles: the "Mototsuke-gaisha" (the listing agent or management company directly commissioned by the landlord, or "Oya-san") and the "Kyakutsuke-gaisha" (the brokerage agency that assists tenant clients in finding housing), both of which coordinate dynamically through the REINS network.
From advertising a vacant room to finalizing the rental agreement, market roles are split into these two distinct positions. Their respective duties and relationship are outlined below:
| Position / Role | Main Responsibilities & Functions |
|---|---|
| Mototsuke (Listing) Company ※Landlord-side / Property Management |
Real estate companies directly contracted by the landlord (Oya-san) to handle property management and recruit tenants. They register detailed property information into REINS, sharing it with other brokers across the country. |
| Kyakutsuke (Tenant-Broker) Company ※Tenant-side / Brokerage Agent |
Brokerage agencies that act as direct consulting windows for you, the tenant. They search for and recommend listings matching your preferences from REINS, and provide total support from property viewings (Naiken) to concluding the rental agreement. |
Most street-front real estate agencies you encounter function as the latter, "Kyakutsuke-gaisha" (tenant brokers). As shown in the diagram below, the moment a Mototsuke-gaisha registers a room, all Kyakutsuke-gaisha across Japan can instantly view its details, enabling them to introduce and guide you to that property.
If any agency can show you the same properties, how should you choose a real estate company?
💡 Key takeaways from this section
Since every real estate agency in Japan has access to the same property database and can introduce the same rooms, you should choose one that provides support tailored to your needs—such as multilingual assistance in English or Chinese, and online contract options. This includes "IT Ju-setsu" (IT-based Explanation of Important Matters), a standard Japanese procedure that allows you to complete legally required contract briefings remotely via video call.
※ Multilingual support in English and Chinese, as well as remote online contracts (via video call consultation, known as "IT Ju-setsu" in Japan), are fully supported.