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IndustryEvent 2024.04.01

Japanese property data: public prices differ from a unit-by-unit transaction ledger

Combine price, hazard and planning data while recognizing the limits of individual-property verification.

Updated Nov 4, 2026

Do public transaction prices immediately establish a fair price for a particular tower-condominium unit?
Verified facts

Launch of the information library

MLIT announced operation of the Real Estate Information Library from 2024-04-01. It combines prices, nearby facilities, hazards and planning information, including transaction and contract-price data. Transaction-price disclosure itself did not first begin at this launch.

Sources [1][2]
Interpretation

Public data as a comparison starting point

Official price data make a blanket claim that Japanese prices are private too broad. Use processed records to find comparable size, age, location and dates rather than treating them as a complete history of an identified unit.

Sources [2]
Limitations

Individual verification remains necessary

Public contract-price information is processed to avoid identifying individual transactions. A search alone establishes neither interior condition, repair plans, leases, collateral nor a future sale price. Contract checks and cost analysis remain necessary.

Sources [1]

Sources

  1. MLIT — Launch of the Real Estate Information LibraryAccessed Nov 4, 2026
  2. MLIT — Transaction-price information provision systemAccessed Nov 4, 2026

Related learning notes

Why wealthy Koreans are drawn to Tokyo tower condominiums — Jung Doo-shin, Miyama & Jung PartnersCompare the video’s claim about private transaction prices with the official disclosure system. Distinguish public from broker data and comparative price, hazard and planning checks from individual contract verification.