Nearly Half of Japan's New Detached Homes Now Earn the Long-Life Quality LabelA · FULL TRANSLATION
- FY2025 saw 155,838 new detached homes certified, 49.8% of housing starts
- The certification rate jumped from 31.3% to 39.3% to 49.8% in three years
- Condominiums lag far behind at just 2.4% of starts certified
- Certified homes get better mortgage terms and tax breaks worth real money
- For buyers, certification is becoming the dividing line in resale value
Japan's transport and housing ministry reports that 155,838 newly built detached houses earned Long-Life Quality Housing certification in fiscal 2025—49.8% of all detached housing starts. Three years ago the rate was 31.3%; cumulative certifications now exceed 1.9 million units.
The 2009 program certifies homes for earthquake resistance, energy performance, durability and maintainability, with concrete rewards: larger mortgage tax deductions, preferential Flat 35 loan rates, and property tax relief—easily a million yen or more over a loan's life.
The striking gap is between housing types. While detached homes near 50%, condominiums managed just 9,433 certified units—2.4% of starts—because whole-building certification burdens developers with costs they cannot recoup in pricing. Japan's quality-assurance system is becoming standard in the detached market while remaining nearly absent from the condo market foreign investors favor.
This is also a policy revolution in slow motion: postwar Japan treated houses as 30-year consumables; this program aims to make them durable, documented assets. For buyers, the practical takeaway is simple—check certification before purchasing new-builds, treat the maintenance records of certified homes as a value premium in resale, and for condos, fall back on management-association health since certification barely exists there. Watch whether uncertified new-builds start trading at visible discounts.
Japan's Ministry of Land, Infrastructure, Transport and Tourism announced on July 17 that certified Long-Life Quality Housing reached about half of new detached housing starts, publishing FY2025 (April 2025–March 2026) certification results compiled from authorities nationwide.
The program, launched in June 2009 under the Act on Promotion of Long-Life Quality Housing, certifies homes built and maintained under approved plans covering durability, earthquake resistance and maintainability. Certification for extensions and renovations of existing homes began in April 2016, and for existing homes without construction work in October 2022.
New-build results: detached houses rose from 111,341 units (31.3% of starts) in FY2023 to 136,809 (39.3%) in FY2024 and 155,838 (49.8%) in FY2025, with a cumulative 1,850,048 units. Multi-unit residential buildings totaled 9,433 units (2.4%) in FY2025, cumulative 50,998. All new-build certifications in FY2025 totaled 165,271 units (23.2% of starts), cumulative 1,901,046 since 2009.
Extensions and renovations totaled 67 units in FY2025 (cumulative 1,930); existing-home certifications totaled 127 units (cumulative 311). The FY2024 detached figure was revised down by 33 units to 136,809. Prefecture-level results are in the attached materials.