Designated Investigation Agency for Real Estate Industry | Soil Contamination Survey and Phase 1 Historical Investigation

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Soil contamination investigation and historical survey.

last updated：Sep 07, 2026

ジオテック

The risk of soil contamination in real estate transactions is assessed by a designated investigation agency through historical research.

In the real estate industry, it is essential to understand the presence or absence of potential soil contamination risks in advance when evaluating asset values in real estate transactions. In particular, soil contamination resulting from past land use can lead to troubles or unexpected costs after the sale. To prevent these risks and proceed with transactions confidently, objective and reliable investigations are crucial. Our designated investigation agency's historical land use survey (Phase 1) addresses these issues and enhances the safety of transactions. 【Usage Scenarios】 - Before signing land sale contracts - Before property handover - Risk assessment during asset value evaluation 【Benefits of Implementation】 - Prevention of troubles through prior understanding of soil contamination risks - Increased transparency and reliability of transactions - Improved accuracy of asset value evaluations

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【Features】 - Reliable investigations by a Ministry of the Environment designated survey organization - Detailed historical research based on old and new closure registries, municipal documents, etc. - Analysis of land use changes through chronological analysis of historical objective materials - Technical specifications including on-site surveys (site visits) - Prompt creation and issuance of "Environmental Investigation Reports in the Name of the Designated Survey Organization" 【Our Strengths】 Geotech provides "Total Ground Services," offering a wide range of engineering services related to real estate, including ground surveys, ground reinforcement design and construction, building differential settlement correction work, and soil contamination investigation and remediation projects. With extensive experience and reliable technology, we support risk management in our clients' real estate transactions.

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Conducting "Phase 1 Environmental Site Assessment" and soil contamination risk assessment in compliance with legal obligations and municipal regulations related to real estate transactions, land sales, or developments of a certain scale or larger. Retrospective analysis of past operational history based on comprehensive collection of public notification records, historical maps, and closed registration books, as well as the preparation of environmental investigation reports. Environmental hazardous substance assessment tests for construction-generated soil (excess soil) that is transported off-site due to demolition work or land alteration, and preparation of reports under the name of designated investigation organizations.