More details

Oil, Gas, and Energy Industry

Illuminated industrial port at night
Integrated Sustainability Solutions

Explore DEISO’s structured solutions combining environmental science, AI, and strategic advisory to address complex sustainability and carbon challenges.

Explore Solutions →
Professional Advisory & Technical Services

Access DEISO’s full portfolio of LCA, ESG, carbon, and independent technical review services designed for defensible, audit-ready outcomes.

View Services →
Service Finder

Identify the most relevant DEISO service based on your project scope, technical requirements, and sustainability objectives.

Find Your Service →
Professional Training Programs

Build internal capability through expert-led training programs focused on real-world implementation, not theoretical learning.

Explore Training →
Training Finder

Select the most suitable DEISO training program based on your role, industry requirements, and technical skill level.

Find Training →
DEISO Contact & Quotation Inquiry
Start Typing

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

Explore Solutions
Discover integrated digital and strategic solutions designed to address complex sustainability and environmental challenges.
Explore Services
Access DEISO’s full portfolio of sustainability advisory, LCA, ESG, GHG, and independent technical review services.
Explore DEISO Training
Browse enterprise-grade training programs in LCA, GHG accounting, EPD, ESG, and advanced sustainability software tools.
Request a Quotation
Submit your requirements to receive a structured quotation aligned with your scope, technical needs, and delivery model.
Book a Strategic Consultation
Schedule a focused consultation to evaluate your objectives, constraints, and potential pathways before quotation or implementation.
Our Clients
Explore the types of organizations DEISO supports across industries, markets, and sustainability maturity levels worldwide.
Ask AI
Ask Mirai AI to identify relevant services, solutions, and training options based on your business needs and sustainability challenges.
Contact
Reach DEISO to discuss projects, request information, or connect with the right team for your technical or commercial inquiry.
Live Chat
Start a real-time conversation for quick guidance on DEISO services, training, solutions, or general support needs.
WhatsApp Chat
Contact DEISO via WhatsApp for convenient communication, fast follow-up, and direct engagement with our team.
Service Finder
Quickly identify the most suitable DEISO service aligned with your organization’s objectives, technical needs, and project scope.
Training Finder
Find the ideal training path tailored to your team’s expertise level, tools, industry context, and learning priorities.
Advanced Search
Search DEISO’s website more precisely to locate services, sectors, training programs, support pages, and technical resources.
Support
Access DEISO support resources, guidance pages, and assistance channels for navigation, platform use, and common inquiries.
Subscribe to Mailing List
Join DEISO’s mailing list to receive updates on services, insights, training opportunities, and new sustainability resources.
Login
Sign in to access available DEISO digital areas, client tools, or account-based resources and platform functions.
Toggle Dark Mode