What OTS does

合同会社OTS (OTS LLC) is a Nagoya-headquartered private Japanese solar power developer founded on January 9, 2015. The company operates an integrated one-stop EPC (Engineering, Procurement, and Construction) model covering land acquisition, permitting, design, construction, sales, and O&M (Operations & Maintenance) for ground-mounted photovoltaic systems across low-voltage, high-voltage, and extra-high-voltage categories, with growing capability in large-scale floating solar (megafloat). Its primary customer base is Japanese corporate enterprises that either acquire completed solar plants as high-yield investment properties or procure renewable electricity and environmental value through corporate or virtual PPA (Power Purchase Agreement) arrangements. The company is also developing grid-scale battery storage entry following Japan's Long-Term Decarbonization Auction.

OTS monetizes through three principal revenue streams: (1) one-time EPC project revenue from selling completed solar plants as investment assets, (2) recurring electric power sales revenue from owned plants under Japan's FIT/FIP (Feed-in Tariff / Feed-in Premium) schemes, including environmental value certificates traded via Digital Grid Corporation's platform, and (3) recurring O&M fees from the installed base, now internalized through the wholly owned subsidiary OTS Maintenance Co., Ltd. (registered as an electrical safety corporation in May 2026). The group comprises approximately 50 employees across the parent and four subsidiaries/JVs, including OTS Engineering, OTS Food Services, OTS Maintenance, and Renewable Energy Supply 合同会社.

OTS reports a track record of approximately 400 completed projects totaling 71,555 kW (72 MW) of installed capacity across 20+ Japanese prefectures, with a 5-year medium-term management plan targeting 166,000 MWh/year of renewable energy supply. The company maintains a capital and business alliance with Digital Grid Corporation (since September 2022) for FIP/virtual PPA capability, and lists major business partners including Sony Group, Tokyu Fudosan Holdings, Mitsubishi Corporation Clean Energy, Shizuoka Gas & Power, Kennedicus, Marubeni, Tokyo Century, and Japan Semiconductor. Financial arrangements include a green loan from Juuroku Bank and corporate hometown tax donations facilitated by Nagoya Bank. The company is privately held as a 合同会社 (godo kaisha / limited liability company) with no public ticker, and discloses no cap table or detailed ownership information.

Name

OTS

Legal name

合同会社OTS

Website

https://ots-nagoya.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

1–10 employees

Short description

合同会社OTS (OTS LLC) is a Nagoya-based Japanese solar developer offering integrated EPC, corporate and virtual PPA power supply, and O&M services to Japanese enterprise customers seeking solar investment assets or renewable electricity.

Ownership category

akta.pro rank

Product category

Solar Power Generation and Renewable Energy Services

NAICS

Solar Electric Power Generation (221114), Electric Power Generation, Transmission and Distribution (2211)

SIC

Electric, Gas & Sanitary Services (4900)

akta.pro primary industry

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

akta.pro secondary industries

Solar PV Power Plant EPC (Utility-Scale) (EUAEAAAG), Utility-Scale PV EPC (Engineering, Procurement & Construction) (EUACAGAB), Renewable Energy Asset O&M (Wind, Solar, Hydro, Geothermal) (EUAEAGAB), Electrical Balance-of-Plant EPC (MV Collection, Cabling, Earthing, Lighting) (EUAEADAB)

Keywords

• Solar EPC services
• Photovoltaic power generation
• Corporate PPA solutions
• Renewable energy development
• Solar O&M services

Headquarters

HQ city

Kasugai

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Solar Power EPC (設計・施工): Design, construction, procurement, and sales of ground-mounted photovoltaic systems. Completed projects are commercialized as high-yield investment properties sold to Japanese enterprises. OTS handles land acquisition, permitting, construction, and O&M as a one-stop service.
2. Power Sales / Feed-in Tariff & FIP (売電事業): Sale of electricity generated by owned solar power plants under Japan's FIT/FIP scheme. Revenue is derived from selling renewable energy electricity and associated environmental value certificates (carbon credits) through the Digital Grid platform.
3. Corporate PPA (自家消費・PPA): Corporate PPA and virtual PPA arrangements providing renewable electricity and environmental value to enterprise customers via bilateral contracts.
4. O&M Services (保守メンテナンス): Operations and maintenance services for solar installations through subsidiary OTSメンテナンス (registered electrical safety corporation as of May 2026), providing ongoing revenue from installed base.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

OTS provides a one-stop solar power generation business for Japanese enterprises, covering EPC (design, construction, procurement, and sales) of ground-mounted, floating, and self-consumption photovoltaic systems, plus corporate and virtual PPA-based electricity supply, recurring O&M services through subsidiary OTS Maintenance, and environmental value trading via an FIP-based platform developed with Digital Grid Corporation. Completed solar plants are commercialized as high-yield investment assets sold to corporate buyers, with annual power sold under Japan's FIT/FIP scheme.

Product overview

OTS (合同会社OTS) is a solar power generation company that operates an integrated business model combining EPC services (design, construction, sales), PPA power supply, O&M, and grid-scale battery storage. Its product portfolio consists of ground-mounted solar PV systems across low/high/extra-high voltage categories, self-consumption solar solutions, and PPA-based renewable energy supply via corporate and virtual PPA models. The company also provides environmental value trading services through a FIP-driven platform powered by Digital Grid Corporation. The group further offers maintenance and management services via its subsidiary OTS Maintenance Co., Ltd., and is expanding into grid-scale battery storage as a new business vertical.

Differentiator

Problem solved

Functional benefit

Products and services

• EPC (Design, Construction, Sales) — Solar Power Generation Systems
• Self-Consumption Solar Power Systems
• PPA Business (Corporate PPA and Virtual PPA)

Quantifiable outcome

• 71,555 kW (72 MW) total installed capacity across approximately 400 projects nationwide
• +3 more outcomes

Named customers7 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

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

• Digital Grid Corporation (デジタルグリッド株式会社)coreStrategic or Co-development Partner · 15 September 2022Capital and business alliance (資本業務提携). Digital Grid is OTS's key technology and platform partner for the FIP制度-based virtual PPA environmental value trading platform. They jointly developed and launched the 'FIP制度を活用したバーチャルPPA' service (September 2022 press release), enabling environmental value transactions for corporate customers.
• Mitsubishi Corporation Clean Energy (三菱商事クリーンエナジー株式会社)majorStrategic or Co-development PartnerListed as a primary business partner (主取引先) — a major counterpart in renewable energy project collaboration and clean energy trading.
• Sony Group Corporation (索尼グループ株式会社)majorOthersListed as a primary business partner (主取引先) — suggests active commercial relationship, likely in renewable energy procurement or environmental value supply.
• Tokyu Fudosan Holdings (東急不動産株式会社)majorOthersListed as a primary business partner (主取引先) — involved in real estate and energy development collaboration.
• Shizuoka Gas & Power (静岡ガス＆パワー株式会社)minorOthersListed as a main business partner (主取引先) — energy supply relationship.
• Kennedicus (ケネディクス株式会社)minorOthersListed as a main business partner (主取引先) — investment and project finance relationship.
• Japan Semiconductor Corporation (株式会社ジャパンセミコンダクター)minorOthersListed as a main business partner (主取引先) — commercial relationship.
• Marubeni Corporation (丸紅株式会社)minorOthersListed as a main business partner (主取引先) — trading and energy project collaboration.
• OTS Engineering (株式会社OTSエンジニアリング)coreOthersGroup subsidiary (グループ会社). Specializes in engineering services within the OTS group.
• OTS Food Services (株式会社OTSフードサービス)coreOthersGroup subsidiary (グループ会社). Provides food and hospitality services within the OTS group.
• OTS Maintenance (株式会社OTSメンテナンス)coreOthersGroup subsidiary (グループ会社), registered as an electrical safety corporation (電気保安法人) under the Chubu-Kinki Industrial Safety Supervision Department as of May 1, 2026. Provides O&M services for solar installations.
• Renewable Energy Supply合同会社 (リニューアブルエナジーサプライ合同会社)coreOthersGroup subsidiary (グループ会社). Specializes in renewable energy supply.

Scale indicators9 records

Recent moves8 records

Expansion highlights7 records

Broad incumbents

• Eurus Energy Holdings: Joint venture of Toyota Tsusho and Tokyo Electric Power Company developing wind and solar projects in Japan and globally. Comparable as a large-scale Japanese renewable energy developer with similar corporate PPA and asset ownership business lines, though Eurus operates at far greater scale and across geographies.
• Tokyo Gas Engineering Solutions: Engineering subsidiary of Tokyo Gas providing EPC, O&M, and energy solutions including renewable energy projects in Japan. Comparable to OTS as a Japanese energy company offering EPC plus ongoing O&M and power supply services, with stronger parent backing and broader service portfolio.
• Nippon Steel Engineering Solar Division: Engineering and construction arm of Nippon Steel providing EPC services for utility-scale solar power plants in Japan. Comparable to OTS as a Japanese EPC contractor for solar projects, but operates as a diversified engineering business within a much larger industrial group.
• Idemitsu Kosan Renewable Energy: Energy major with renewable energy operations including solar power development in Japan. Comparable as a large-scale Japanese developer of solar generation assets with corporate PPA offerings, but operates as a downstream/petroleum conglomerate rather than a pure-play renewable EPC specialist like OTS.
• SB Energy Corp. Subsidiary of SoftBank Group developing utility-scale solar power plants in Japan with full EPC and project ownership capabilities. Operates as a much larger incumbent in the same Japanese utility-scale solar EPC and generation market as OTS, with deeper capital and stronger parent backing.
• Sharp Energy Solutions Japan: Renewable energy arm of Sharp Corporation developing rooftop, ground-mounted, and floating solar projects in Japan with EPC, PPA, and O&M offerings. Directly comparable to OTS in product portfolio (including floating solar) and customer base, but operates with the legacy technology, brand, and capital base of a major electronics manufacturer.

Direct peers

• Pacifico Energy: Tokyo-headquartered developer of utility-scale solar and storage projects in Japan with end-to-end development capabilities. Directly comparable to OTS in business model (project development, EPC, PPA), geography (Japan), and customer base (corporate renewable energy off-takers), but operates at significantly larger scale.
• Renova Inc. Listed Japanese renewable energy developer (TSE: 9519) developing solar, wind, and biomass projects across Japan with EPC, PPA, and asset ownership. Highly comparable to OTS as a vertically integrated Japanese renewables developer serving corporate customers, though operating at much larger scale and across multiple renewable technologies.
• Daiwa House Energy: Renewable energy subsidiary of Daiwa House Industry, one of Japan's largest homebuilders, developing rooftop and ground-mounted solar projects with EPC, PPA, and asset ownership. Comparable to OTS as a vertically integrated Japanese solar developer serving corporate customers, with strong real estate synergy advantages.

Regional players

• Shizuoka Gas & Power: Regional gas and energy utility in Shizuoka Prefecture that is a disclosed OTS business partner, engaged in energy supply and renewable energy trading. Comparable as a regional Japanese energy company active in renewable supply and PPA-style arrangements, though smaller in scope than OTS's nationwide project portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries4 records

Funding overview

Funding rounds

Investors

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

M&A

Investments2 records

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

Frequently asked questions about OTS