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Contact Info.

English Address:
Level 21 Shiodome Shibarikyu Building
1-2-3 Kaigan, Minato-ku
105-0022 Tokyo, Japan.

Japanese Address:
〒105-0022 東京都港区海岸1-2-3
汐留芝離宮ビルディング21階, 合同会社DEISO.

Phone (JP): 03-5403-6479 / 0488-72-6373
Phone (EN): 070-6969-7700
Fax: 03-5403-6475 / 0488-72-6373
Email: info@dei.so

Latest News

Engineering the Future of Sustainable Performance

Execute Sustainability Projects
Full technical responsibility for LCA, Scope 3, PCF, and EPD execution under real-world conditions.
Initiate Technical Audit
Identify data gaps, inconsistencies, and risks before submission or verification.
Start Rapid Review (48–72h)
Stabilize time-sensitive sustainability work and reduce technical risk under tight deadlines.
Access Compliance Support
Structured execution aligned with regulatory, disclosure, and standards requirements.
View Solutions
Integrated sustainability systems combining execution, intelligence, and digital infrastructure.
View Services
Full portfolio across LCA, GHG, ESG, PCF, EPD, and technical validation.
View Case Studies
Real project execution and technical outcomes across industries and regions.
Ask DEISO AI
Identify the right execution pathway using AI-assisted sustainability intelligence.
Find the Right Service
Match your project scope with the appropriate execution or validation service.
Request Project Proposal
Submit your requirements for a structured proposal aligned with your technical scope.
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