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    Based in Japan. Delivering Global Sustainability Impact.

    Partnering with organizations worldwide to drive measurable environmental performance and build future-ready sustainability systems.

    Corporate Profile

    Driving Impact. Enabling Clients to Deliver Impact.

    Our mission is to act as a catalyst for measurable environmental and sustainability performance, empowering organizations to achieve sustainable growth at a global scale.

    Corporate Profile
    .Profile

    01: Corporate Profile

    Nature of Business
    Sustainability operating systems

    The company DEISO LLC is a Japan-based sustainability operating systems firm that builds and supports the enterprise environments organizations use to manage environmental sustainability work with technical consistency, governance, and execution confidence.

    DEISO's work covers the systems, data structures, workflows, calculations, technical review processes, reporting foundations, digital tools, and AI-supported workflows needed to execute sustainability functions across LCA, GHG accounting, PCF, EPD, ESG, carbon management, environmental performance, and sustainability governance.

    DEISO's core business activities include, but are not limited to:

    a: Environmental engineering and sustainability services and solutions:

    DEISO LLC provides comprehensive environmental engineering and sustainability services, covering assessment, analysis, system development, strategic planning, and technical advisory across a wide range of environmental and sustainability domains.

    These services are designed to support organizations in improving environmental performance, strengthening sustainability governance, and implementing structured, verification-ready solutions aligned with international standards and operational requirements.

    b: Environmental Qualification and Certification Support: DEISO LLC provides technical support, advisory services, and structured preparation for environmental qualification and certification processes, including documentation development, methodological alignment, and readiness assessment in accordance with applicable standards and frameworks.

    c: Research and development (R&D):

    DEISO LLC conducts research and development activities focused on advancing environmental sustainability methodologies, digital systems, and structured data systems, including environmental modeling, carbon analytics, and AI-supported sustainability applications.

    d: Human resource development and capacity building:

    DEISO LLC provides execution-based capacity building programs and capability development services designed to strengthen technical skills, sustainability knowledge, and organizational capacity across environmental and sustainability domains.

    e: IT services, software development, artificial intelligence (AI), and cloud services:

    DEISO LLC provides IT services, software development, AI-supported systems, and cloud-based systems tailored to environmental sustainability applications, including data platforms, analytical tools, and digital workspace systems.

    The company’s activities include the design, development, deployment, licensing, and commercialization of software products, digital tools, and structured data systems supporting environmental analysis, carbon management, and sustainability performance.

    f: Related business ventures:

    DEISO LLC may engage in any lawful business activities that are incidental, complementary, or related to its core operations, including the expansion of services, systems, and technological offerings within environmental sustainability, digital systems, and associated fields.

    Corporate Number

    DEISO LLC — Japan corporate registry

    4370003005121

    Technical Authority

    Technical direction behind DEISO client engagements

    DEISO client and institutional engagements carry senior technical direction across sustainability execution, independent technical review, LCA, GHG accounting, PCF, EPD, and verification-ready delivery.

    Technical direction is led by Dr. Mahdi Ikhlayel, PhD — Sustainability Director, Sustainability OS Architect & Technical Execution.

    View technical direction →

    02

    Official name in Japanese

    合同会社 DEISO

    03

    Official name in English

    DEISO LLC.

    04

    Establishment date

    February 19, 2021

    05

    Address

    DEISO LLC., Floor 21 Shiodome Shibarikyu Building, 1-2-3 Kaigan, Minato-ku, Tokyo 105-0022, Japan

    06

    Company bank

    Mizuho Bank, Ltd.

    07

    Email address

    info@dei.so

    08

    Tel

    03-5403-6479

    09

    Domain name

    Primary: dei.so
    Secondary: www.deiso.co.jp & www.deiso.jp

    10

    Inquiries

    For inquiries, reach us at info@dei.so or via the contact form.

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    Trusted worldwide for sustainability services, solutions, and professional training across 35+ countries.

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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

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