DEISO (Pronounced DEE-so) builds sustainability operating systems
DEISO helps organizations execute, review, and manage LCA, GHG accounting, PCF, EPD, ESG, and AI-supported sustainability work.
We design the workflows, prepare the data structure, perform the technical work, review the results, build the evidence base, and support teams with implementation-focused capacity building. The goal is simple: sustainability work that is easier to manage, easier to verify, and ready for reporting, decisions, and verification.
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We build the operating system behind sustainability work
DEISO is a Tokyo-based sustainability systems company. We help organisations execute, review, and manage LCA, GHG accounting, PCF, EPD, ESG, and AI-supported sustainability work.
We build the structure behind sustainability work: data workflows, calculation systems, technical review steps, evidence files, reporting logic, and decision-support processes. This helps companies move from scattered sustainability tasks to a managed operating system.
Our work combines technical execution, independent review, verification readiness, and implementation-focused capacity building. The result is sustainability work that is easier to manage, easier to verify, and ready for reporting, decisions, and verification.
DEISO has supported clients across 35+ countries, working as a technical partner where accuracy, reliability, and verification readiness matter.
Who we are
DEISO stands for Integrated Environmental Sustainability Oriented Research and Development. Our mission is simple:
To make sustainability work organised, measurable, and ready for real-world decisions.
We work at the intersection of environmental science, sustainability data, technical modelling, workflow design, and AI-supported sustainability systems.
DEISO is not only an advisory company. We take responsibility for the technical work behind sustainability outcomes: preparing data, building models, reviewing results, identifying gaps, correcting issues, and helping teams use the system after handover.
What we build
DEISO builds sustainability operating systems and technical execution for organisations that need reliable, verification-ready results.
Core service areas
- Life Cycle Assessment (LCA) modelling, review, and improvement
- Scope 1, Scope 2, and Scope 3 GHG accounting systems
- Product Carbon Footprint (PCF) development and review
- Environmental Product Declaration (EPD) readiness and preparation support
- ESG data workflows, evidence systems, and reporting support
- Pre-submission technical review before verification or reporting
- Sustainability data architecture and internal governance workflows
- AI-supported decision-support systems for sustainability work
- Implementation-focused capacity building for internal teams
When companies work with DEISO
- Internal teams need stronger structure, technical support, or review capacity
- Sustainability data is scattered across departments, suppliers, files, and tools
- LCA, GHG, PCF, EPD, or ESG work needs to be prepared for verification or reporting
- Data quality, calculation logic, or methodology consistency is uncertain
- A regulatory, customer, or procurement requirement is approaching
- The organisation needs a repeatable system instead of one-time sustainability work
In these situations, DEISO helps diagnose the gaps, organise the data, execute the technical work, review the outputs, and stabilise the operating system behind the sustainability function.
Advanced sustainability system capabilities
- Scope 3 category-level modelling and supplier data validation
- EPD dataset structuring aligned with EN 15804 and PCR requirements
- Comparative LCA and decision-support environmental modelling
- Industrial carbon readiness and exposure diagnostics
- AI-supported sustainability data architecture and workflow design
- Internal evidence systems for verification readiness and technical review
- Capacity building linked directly to the systems, workflows, and methods we build
- Regulatory alignment across international sustainability frameworks
How we work
- Assess — we review the data, methods, models, documents, workflows, and current risks.
- Structure — we organise the sustainability data, responsibilities, calculation logic, and evidence flow.
- Execute — we build or improve the LCA, GHG, PCF, EPD, ESG, or AI-supported sustainability work.
- Review — we check consistency, assumptions, documentation, methodology, and verification readiness.
- Support — we help internal teams understand and operate the system through implementation-focused capacity building.
The goal is not only to finish one project. The goal is to leave the organisation with a clearer, stronger, and more repeatable sustainability operating system.
How DEISO turns sustainability data into decisions
DEISO turns data, models, evidence, and workflows into outputs that teams can use.
- Data is organised and checked for consistency
- Models and calculations are reviewed for technical reliability
- Evidence is structured for verification readiness and technical review
- Results are translated into clear technical and business decisions
- AI-supported systems support analysis, interpretation, and workflow efficiency
DEISO combines expert-led execution, structured data architecture, and AI-supported analysis to make sustainability work more reliable, manageable, and decision-ready.
Why DEISO
- We build systems, not scattered outputs
- We execute the technical work, not only advise on it
- We support LCA, GHG, PCF, EPD, ESG, and AI-supported sustainability work
- We prepare sustainability work for verification readiness, technical review, and reporting
- We combine technical review with practical implementation support
- We help internal teams build capacity around the operating system we build
- We bring global project experience across 35+ countries
At DEISO, we help organisations build the operating system behind sustainability work: the data, workflows, technical review, evidence, and capacity needed to make sustainability reliable and ready for action.
Dr. Mahdi Ikhlayel, PhD, Sustainability Science
Sustainability Director, Sustainability OS Architect & Technical Execution
Every engagement DEISO delivers is technically directed, quality-assured, and methodologically governed by Dr. Ikhlayel — a senior sustainability scientist with over a decade of applied practice across LCA, GHG, PCF, and EPD.
Work that has reached Saudi Aramco, PETRONAS, Saudi Energy, WWF, Seedstars, NTU Singapore, UDST Qatar, and Seoul National University — across industry and academia in 35+ countries.
Sustainability operating systems
Build the data, workflows, governance, technical review, reporting, capacity building, and AI support behind sustainability work.
Independent technical audit
Identify risks, inconsistencies, and critical gaps before verification or submission.
Sustainability project execution
End-to-end delivery of LCA, Scope 3, PCF, and EPD projects.
Rapid sustainability data review
Fast expert review of sustainability data, models, and reports within 48–72 hours.
Free technical evaluation
Request an expert evaluation of your project and identify the right execution pathway.
Case studies
Real projects and technical solutions delivered across industries and regions.
Our clients
Organizations that rely on DEISO for project delivery and technical review.
Sustainability results workspace
Structured environment that turns sustainability data into decision-ready outputs.
Company presentation
Overview of DEISO positioning, execution model, and capabilities.
Services and projects across 35+ countries
Our international experience reflects not only geographic reach, but the ability to execute across diverse industries, regulatory environments, and project requirements — ranging from Life Cycle Assessment (LCA) and Scope 3 GHG accounting to Product Carbon Footprint (PCF), Environmental Product Declarations (EPD), and sustainability operating systems.
We support organisations that require reliable execution, technical validation, and measurable outcomes. Each engagement is structured so that sustainability work is not only completed, but defensible, verification-ready, and aligned with real-world application and decision-making needs.
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