Designated Investigation Agency | Historical investigations to eliminate risks of damages and legal disputes after sale.

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Geographical and historical survey

last updated：Sep 07, 2026

ジオテック

Prevent massive damages and long-term legal disputes due to hidden defects after delivery! Conduct a voluntary historical investigation to confirm the safety of the underground before the contract.

The discovery of soil contamination as a "hidden defect" after the transfer of real estate poses a fatal business risk for sellers, leading to massive damage claims and prolonged futile legal disputes. This service is a voluntary investigation for sellers to completely ascertain underground safety before the sales contract, preventing such future legal entanglements. The investigation report, created from a neutral and rigorous perspective, serves as powerful legal evidence to fully protect the company from significant environmental liabilities after the sale. It allows for clear control of past negative legacies and enables the transfer of healthy land assets without concerns. This plan provides reliable evidence of underground safety during real estate sales and serves as an environmental solution to sincerely protect the company's social credibility and the value of important land assets. Please feel free to trust us with this.

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basic information

This is a specification standard for high-precision voluntary soil surveys that fully comply with Article 5, Paragraph 1 of the Soil Contamination Countermeasures Act and relevant technical standards of related laws. In the historical investigation, public notification documents, past aerial photographs, and administrative information such as local history are analyzed from multiple perspectives to accurately determine the risk of contamination. In the sample collection process, core cutters that can drill through paved surfaces and simple boring machines capable of dry excavation are used, ensuring strict procedures to completely prevent secondary contamination. The collected soil and groundwater samples are managed in dedicated containers in a cool, dark place at 0 to 4°C, and the leaching and content of specific hazardous substances are measured rigorously. We provide extremely precise data based on objective facts.

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Applications/Examples of results

It is used as environmental risk adjustment data for the objective asset value (real estate appraisal) required when obtaining loans from financial institutions, as well as for evaluating environmental liabilities of owned real estate in corporate business revitalization and M&A, and for on-site risk management as part of obtaining and maintaining ISO 14001 certification. Additionally, it plays a decisive role as a seller-led defense measure before contracts to completely eliminate troubles such as being sued for massive damages after soil contamination is discovered following land transactions. Furthermore, it is widely utilized in construction practices for preventing the spread of contamination to surrounding groundwater due to excavation work, quality management of on-site remedial soil, and making pre-judgments for sorting and processing to dramatically reduce residual soil disposal costs.