About Sumasate
Sumasate is a SaaS company that develops AI-powered rent appraisal systems. Its product, Sumasate, enables users to complete the entire process—from setting rent for rental properties to preparing supporting documents—quickly and seamlessly.
In many countries, including those in Europe and North America, rent and real estate transaction data are publicly disclosed and well organized, ensuring market transparency. In Japan, by contrast, such disclosure remains limited, making it difficult to accurately grasp the realities of the rental market. In this environment, the proprietary database of over 3 billion rent data points that Sumasate has independently accumulated stands as an irreplaceable asset. By leveraging this data through advanced algorithms and refined product design, Sumasate delivers highly accurate rent appraisals.
As of 2026, the platform has been adopted by more than 5,000 companies nationwide—primarily property management firms, including 8 of Japan’s top 10 residential rental management companies. Its use now extends well beyond property management, reaching homebuilders, developers, major financial institutions, asset management firms, and REIT operators. As its value as
an analytical foundation for rental market data grows, Sumasate has become a driving force behind digital transformation (DX) in Japan’s rental housing market.
Its influence extends to the market as a whole. The properties managed by Sumasate’s paying customers total 7.6 million units—roughly half of Japan’s 15.3 million privately owned rental units. Today, Sumasate has grown into an infrastructure capable of influencing rent appraisals for half of Japan’s private rental market.
