Information Disclosure of the Designated Investigation Institution under the Soil Contamination Countermeasures Act
Organisational Information as a Designated Investigation Institution under Japan’s Soil Contamination Countermeasures Act (as of October 1, 2025).
A. Disclosures as a Designated Investigation Institution
- Name
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Tokyu Construction Co., Ltd.
- Designation number
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Env 2003-3-3047
- Address
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Shibuya Chikatetsu Building, 1-16-14 Shibuya, Shibuya-ku, Tokyo
- Contact
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Environmental Engineering Section, Technology Department, Civil Engineering Business Division
Tel : +81-3-5466-5286
Fax: +81-3-5466-6058
- Office location
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Shibuya-ku, Tokyo
- Business registration and permit
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General construction business, construction consulting, first-class architect’s office, real estate business (real estate transactions), etc.
- Number of technical managers
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Head Office (Shibuya-ku, Tokyo / Nationwide): 6
- Number of engineers working on soil contamination
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Same as above: 12
B. Record of Soil Contamination Investigations
Number of orders received as prime contractor for soil contamination investigation*Number of contracts
| FY2020 | FY2021 | FY2022 | FY2023 | FY2024 | ||
|---|---|---|---|---|---|---|
| Subject to the Act | ①Investigation Subject to the Act (Articles 3, 4, and 5) | 5 | 13 | 10 | 5 | 8 |
| ②Investigation Subject to the Act (Article 16) | 0 | 0 | 0 | 0 | 0 | |
| Not subject to the Act (including ordinances) | ③Investigation of documents and materials only | 1 | 0 | 0 | 0 | 3 |
| ④Investigation with sampling and analysis | 7 | 7 | 7 | 6 | 5 | |
| ⑤Investigation with sampling and analysis of transported soil | 0 | 0 | 0 | 0 | 0 | |
Main businesses of clients
C. Technical Competence (Qualifications and Number of Certified Engineers)
- Soil contamination investigation technical managers
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6
- Soil environment supervisors
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2
- Soil environment conservation specialists
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11
- Soil environment risk managers
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9
- Professional engineers (general administration)
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1
- Professional engineers (construction)
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4
D. Quality Management Initiatives (Status of Quality Assurance/Quality Control for Investigation Activities)
We implement initiatives in accordance with the ISO 9001:2000 and the Guidelines on Information Disclosure and Quality Management for Designated Investigation Institutions under Japan’s Soil Contamination Countermeasures Act issued by the Ministry of the Environment.
E. Others
- Track Record in Risk Communication
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We have implemented numerous activities, including holding briefing sessions for local residents regarding remediation works, responding to customer inquiries, and providing support for administrative procedures related to countermeasure projects.
- Environmental conservation activities