The latest dataset incorporates J-REIT results through May
The Association for Real Estate Securitization updated the ARES Japan Property Index and related measures on August 28. According to the AJPI download page, J-REIT data are reflected through fiscal periods ending in May 2026 and private-fund data through April 2026. Values through November 2025 are classified as final, while December 2025 through May 2026 remain preliminary. AJPI tracks investment performance based on assets managed by major real estate investment participants and therefore offers a different perspective from online asking prices or the advertised gross yield of a single building.
The benchmark helps separate investment performance from headline yield
Japanese property advertisements aimed at individual investors often highlight gross yield based on projected annual rent divided by purchase price. Realized performance is broader: investors need to consider income after vacancy and operating expenses as well as changes in asset value during the holding period. Institutional benchmarks such as AJPI make it possible to examine the performance of Japanese residential, office, retail, logistics and other assets at the market level. For international buyers of large income-producing assets, such data can provide an external reference against which assumptions in a seller's investment model can be tested.
Preliminary values can change and should not be treated as forecasts
ARES labels the figures from December 2025 onward as preliminary, meaning they may be revised when additional information is incorporated. It also notes that even finalized data can change if listed J-REITs later correct securities filings. A single monthly update should therefore not be presented as a definitive forecast for the entire Japanese property market. Investors can use AJPI as a benchmark, but a specific transaction still requires separate analysis of acquisition price, actual rents, occupancy, operating expenses, financing costs, repairs and future exit liquidity. Market-level performance and a property's projected return are related but are not interchangeable.