DEISO has entered a strategic partnership with Framence GmbH, a German pioneer in photorealistic digital twin technology, to bring cutting-edge digital twin innovation to Asia and the Middle East.
🔘 Learn More About the DEISO × Framence Partnership

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An environmental sustainability company based in Japan with a global perspective.

-An Integrated Sustainability Ecosystem.

🌿 DEISO is a Tokyo-based sustainability innovation company merging science, AI, and strategic consulting to tackle complex environmental challenges globally. We empower industries, governments, and academia through AI-driven tools, life cycle modeling, premium training, and compliance services aligned with ISO and GHG standards. Our mission is to make sustainability intelligent, measurable, and scalable—helping organizations worldwide lead with impact.
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🌍 Engineering Sustainability with Intelligence and Impact

In a world accelerating toward net-zero goals, DEISO stands as a bold force in bridging advanced environmental intelligence with practical business and policy solutions. Headquartered in Tokyo, Japan, DEISO integrates scientific precision with digital innovation to address complex sustainability challenges—empowering industries, governments, and academia to achieve measurable environmental outcomes.

With a clear mission to make sustainability intelligent, scalable, and accessible, DEISO drives the global shift toward low-carbon, circular, and resilient systems. Through expert consulting, applied research, premium training, and strategic partnerships, we embed AI into sustainability workflows and provide access to advanced digital twin technology—enabling organizations to rethink how they model, act on, and communicate environmental performance.

Our integrated portfolio—spanning strategic advisory, transformative technologies, and capability development—equips clients to lead with clarity and confidence. At DEISO, we don’t just deliver environmental solutions—we build capabilities, create enduring value, and help you make a lasting impact on people, planet, and performance.

DEISO vision diagram on sustainability and innovation.

DEISO (Integrated Environmental Sustainability Oriented Research and Development).

Clients Map

Delivered Services & Projects in 35+ Country

DEISO is dedicated to helping clients excel in sustainability. Our global reach, encompassing over 35 countries, allows us to deliver tailored projects, services, and training to drive positive change.

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DEISO By Numbers

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Global Network of Senior Independent Consultant Employees

Featured Clients

Trusted worldwide for sustainability services, solutions, and training in 35+ country.

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DEISO: Make Impact.

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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

🆘 DEISO Quick Help & Support Center

🛠️ How to Seek Help from the DEISO Website

🔍 Search Assistance
  • Use Ctrl+Shift+D on any Windows or Mac device to launch our global site search with autocomplete.
  • On both desktop and mobile, click the search icon at the left center edge of the screen to open the same powerful search tool.
  • For detailed exploration, visit our Advanced Search page:
    👉 https://dei.so/advanced-search

🤖 Ask AI for Instant Support

💬 Connect with the DEISO Team

📧 Email Us

🧾 Submit a Support Ticket

📶 Check Platform & Website Status

📚 Need More Help?
  • Visit our Frequently Asked Questions (FAQ):
    👉 https://dei.so/faq
  • Explore our full Help Center:
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