CO2OS Inc.

What CO2OS Inc. does

CO2OS Inc. (株式会社CO2OS) is a Japanese renewable energy services company providing full-lifecycle support for solar power plants and battery storage facilities. Headquartered in Minato-ku, Tokyo, the company operates across five integrated service lines: asset management, technology consulting (including technical due diligence and PVsyst-based simulation), nationwide operations and maintenance (O&M), design/construction/restoration, and battery storage services. Its customer base comprises solar power plant owners, institutional investors, asset managers, developers, and corporate energy buyers such as Osaka Gas.

The company is a wholly-owned subsidiary of Daiwa Energy Infrastructure (DEI), itself part of the Daiwa Securities Group, and was established in May 2023 via an absorption-type split from predecessor CO2O (founded 2012). CO2OS has accumulated what it describes as the highest domestic technical due diligence track record in Japan (5.5GW+) and manages O&M for 116 plants totaling 1.09GW. Its technology stack combines drone-based aerial and infrared thermography inspection with AI-based anomaly detection for predictive maintenance, supported by a group-level monitoring system for portfolio diagnostics, and a risk-based maintenance methodology codified into national guidelines (JPEA 2018, JAAM 2020) authored by its team.

Revenue is generated across managed services (recurring O&M and asset management fees on multi-year contracts), project-based EPC and consulting work, and increasingly through battery storage services including FIP-transition advisory and grid-scale O&M. GTM is sales-led and event-driven (Solar Week, SMART ENERGY WEEK, PV Business Seminar), supplemented by referral channels through strategic partners DEI, Toshiba ESS, Gotion, Osaka Gas, Nagase, and Captax. The business model relies on long-dated B2B contracts with no public pricing schedule and no consumer-facing channels.

Name

CO2OS Inc.

Legal name

株式会社CO2OS

Website

https://co2o-s.com

Company type

Private

Founded year

2023

Operating status

Operating

Short description

CO2OS Inc. is a Japan-based renewable energy services firm providing full-lifecycle solar and battery storage support — due diligence, O&M, asset management, EPC and consulting — to plant owners, institutional investors, and corporate energy buyers, backed by Daiwa Securities Group via DEI.

Ownership category

akta.pro rank

Product category

Solar Energy Services

NAICS

Solar Electric Power Generation (221114)

SIC

Electric Services (4911)

akta.pro primary industry

Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB)

akta.pro secondary industries

Renewable Energy Asset O&M (Wind, Solar, Hydro, Geothermal) (EUAEAGAB), Solar PV Power Plant EPC (Utility-Scale) (EUAEAAAG), Commissioning, Testing & Energization Services (Pre-Commissioning, Grid Code Compliance) (EUAMAFAK)

Keywords

• Solar power plant services
• Operations maintenance O&M
• Technical due diligence
• Battery storage integration
• Renewable asset management

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Supply Chain

Revenue model

1. O&M (Operations & Maintenance) Services: Recurring revenue from operations, monitoring, inspection, and maintenance of solar power plants and battery storage facilities. Includes daily/monthly/annual inspections, remote monitoring, vegetation control, snow removal, and emergency response. Revenue is recurring based on contract terms, typically multi-year agreements with annual fees.
2. Asset Management Services: Ongoing management of solar power plant assets including performance reporting, accounting management, contract management, risk management, and improvement proposals. Targets asset owners, investors, and asset managers requiring third-party operational oversight.
3. EPC (Engineering, Procurement, Construction): One-time project-based revenue from design, procurement, and construction of new solar plants, battery storage installations, repowering, restoration, and renovation works. Also includes cable theft recovery with aluminum wiring conversion.
4. Technical Consulting / Due Diligence: Technical evaluation and consulting services for solar power plant investment decisions, including construction management, completion inspection, and feasibility studies. One-time or per-engagement fees.
5. Battery Storage Services: Comprehensive battery storage services including FIP transition simulation, site surveys, construction, O&M, evaluation/due diligence, and manufacturer inspection agency services. Mix of project-based and recurring O&M revenue.
6. Power Plant Development: Development of new solar power plant projects, including land acquisition, permits, engineering, and construction. Project-based revenue from development fees and EPC.

Pricing tiers

Go-to-market motion3 records

Distribution channels2 records

Marketing channels6 records

Core offering

CO2OS Inc. provides full-lifecycle services for solar power plants and battery storage facilities in Japan, spanning technical due diligence, design and construction (EPC), operations and maintenance (O&M), asset management, and battery storage integration including FIP-transition support. The company serves solar power plant owners, institutional investors, asset managers, and energy companies with consultative, project-based engagements backed by the largest domestic technical due diligence track record in Japan (5.5GW+).

Product overview

CO2OS is a renewable energy company specializing in solar power plants and battery storage, offering an integrated service portfolio spanning five core areas: Asset Management (maximizing investment efficiency through comprehensive asset oversight), Technology Consulting (technical due diligence, construction management, repowering), O&M (nationwide operations and maintenance with AI-powered anomaly detection and drone inspections), Design & Construction (EPC, restoration, and maintenance-focused engineering), and Battery Storage Services (installation, evaluation, and O&M for grid-scale and solar co-located battery systems). The company leverages partnerships with battery manufacturers (Gotion, Huawei) and integrates technologies including AI-based predictive maintenance and drone-based thermography inspection to deliver end-to-end lifecycle support for solar and storage assets.

Differentiator

Problem solved

Functional benefit

Products and services

• Asset Management Services Comprehensive third-party asset management for solar power plants including performance management, accounting, contract management, risk management, operational reporting, and improvement proposals for asset owners, investors, and asset managers.
• Technology Consulting Technical consulting services for solar and battery storage investments including technical due diligence, power generation simulation (PVsyst), construction management, completion inspection, repowering studies, and feasibility assessments for institutional investors and developers.
• Operations and Maintenance (O&M) Nationwide O&M services for solar power plants and battery storage facilities including annual/precision inspections, daily/monthly inspections, remote monitoring, drone-based aerial and infrared thermography inspection, AI-based anomaly detection, digital inspection reports, vegetation control, snow removal, and emergency response.
• Design and Construction / Restoration EPC, restoration, and maintenance-focused engineering services for solar power plants including new development, battery co-location installation, repowering (central-to-distributed PCS and bifacial module upgrades), cable theft recovery with aluminum wiring conversion, and natural disaster restoration.
• Battery Storage Services End-to-end battery storage services including FIP-transition revenue simulation, site survey, EPC for grid-scale and co-located battery systems, technical due diligence, manufacturer inspection agency services, and ongoing O&M for battery storage facilities.

Quantifiable outcome

• Over 5.5GW of solar power plant technical due diligence experience — the highest in Japan
• +4 more outcomes

Named customers5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability3 records

Feature6 records

Partnerships

Seven partnerships are on record, tiered minor, major and core.

• 大和リアル・エステート・アセット・マネジメント株式会社 (Daiwa Real Estate Asset Management)minorStrategic or Co-development Partner · 20 February 2025Designated as planned asset manager for the Kumamoto grid-scale battery storage project (100,300kWh, operation start 2028), working alongside CO2OS (planned O&M) and DEI-SPC.
• 長瀬産業株式会社 (Nagase)majorStrategic or Co-development Partner · 30 October 2024Three-party partnership with Nagase, Capt克斯, and CO2OS for battery storage evaluation diagnostic services. Services include residual value assessment of battery storage facilities, and comprehensive support services from evaluation through O&M. Targeting the growing battery storage market in Japan.
• 株式会社キャプテックス (Capt克斯)majorStrategic or Co-development Partner · 30 October 2024Three-party partnership with Nagase, Capt克斯, and CO2OS for battery storage evaluation diagnostic services including residual value assessment, evaluation, and O&M support for battery storage facilities.
• 国軒高科日本株式会社 (Gotion High-Tech Japan)coreTechnology or Integration · 1 March 2024Three-party partnership with CO2OS, Gotion Japan, and DEI for battery storage development and O&M in Japan. Aiming to deploy 1GWh of Gotion batteries in Japan within 2 years. Gotion provides battery products and technical knowledge; CO2OS handles technical support and maintenance; DEI provides project evaluation and financing.
• 東芝エネルギーシステムズ株式会社 (Toshiba Energy Systems & Solutions)coreStrategic or Co-development Partner · 24 August 2023Three-party partnership with Toshiba ESS and DEI covering solar power plant development, EPC, and O&M services. Toshiba ESS provides high-value EPC in extra-high-voltage segment (2MW+, top-class market share) and renewable energy aggregation services. CO2OS provides technical DD, high-voltage EPC, and O&M services. Collaboration also includes integrated monitoring systems and group management (群管理体制) for multiple plants.
• 大阪ガス株式会社 (Osaka Gas)majorStrategic or Co-development Partner · 31 July 2023CO2OS provides asset management services for Osaka Gas and JAML's portfolio of 7 non-FIT/non-FIP solar power plants totaling 8,500kW. Projects include an agricultural-solar co-location in Hokkaido. CO2OS handles technical consulting during construction and ongoing asset management services.
• ＪＡ三井リース株式会社 (JAML)majorStrategic or Co-development Partner · 31 July 2023Joint investment with Osaka Gas in non-FIT/non-FIP solar power portfolio. JAML and Osaka Gas each hold 50% in the project company AO電力1号合同会社. CO2OS provides asset management for this joint portfolio.

Scale indicators7 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Renova Inc. Japanese renewables developer and asset operator with a portfolio that includes utility-scale solar and renewable energy operations. Comparable as a full-lifecycle player in Japan's solar value chain.
• Pacifico Energy: Independent Japanese renewable energy developer involved in solar development, O&M, and asset management. Comparable in offering end-to-end lifecycle services for solar assets, including operation of utility-scale plants.
• Toshiba Energy Systems & Solutions: Major Japanese EPC and O&M provider for utility-scale solar and energy storage, and a strategic partner of CO2OS. Competes head-to-head in high-voltage solar EPC, O&M, and aggregation services, with overlapping FIP-transition and battery storage offerings.
• Shizen Energy: Japanese renewable energy company spanning solar development, O&M, and IPP operations. Overlaps with CO2OS in mid-to-large scale solar asset operation and the pivot toward storage and FIP-era services.
• Bison Energy: Japanese solar developer and asset manager active across utility-scale solar and battery storage. Named together with CO2OS as industry peers at the PV Business Seminar, indicating comparable positioning in FIP transition and battery integration services.

Emerging players

• Yokogawa Electric: Japanese industrial automation and controls company expanding into renewable energy asset monitoring and energy management; adjacent competitor in the digital monitoring and predictive maintenance layer that CO2OS offers under its Smart O&M.

Broad incumbents

• Looop: Japanese solar company with a broader renewable energy portfolio spanning residential, commercial, and utility-scale, plus growing retail electricity operations. Overlaps with CO2OS in solar EPC and operations but serves additional downstream customer segments.
• SB Energy (SoftBank): Large-scale renewable energy developer and operator backed by SoftBank, operating significant Japanese solar capacity. Competes with CO2OS for O&M and asset management mandates on utility-scale solar assets.
• ENNET Corporation: Japanese energy services provider active in power generation, including renewable assets and electricity retail. Overlaps with CO2OS in operating renewable energy infrastructure and offering related technical services in Japan.

Regional players

• Sungrow Japan: Japanese arm of leading global solar inverter and battery storage supplier, providing PV inverters, PCS, and storage systems that increasingly bundle service and O&M capabilities; competes in the storage-integration space CO2OS is building around.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CO2OS Inc.