Tatemono IQ transaction medians represent raw price-per-m² aggregates across all unit sizes, building ages, and micro-geographies within each city's ward area. In contrast, institutional index figures (such as Tokyo Kantei's 70m²-equivalent baseline) use hedonic regression models designed to smooth out single-period transaction noise. While index models yield higher headline figures by filtering out compact units, Tatemono IQ uses raw transaction medians because they accurately map actual transaction liquidity — reflecting the exact capital outlays deployed by buyers in the market.
For Tokyo specifically: our median includes the significant volume of high-yield compact studio and one-bedroom units common in the 23 wards. This produces a lower absolute price point than a normalized 70m² family-condo index, but offers a truer, unfiltered view of total market velocity — the actual prices at which units transacted across the full spectrum of buyer activity.