What Mirai Energy Partners does

Mirai Energy Partners is a Tokyo-based hydropower engineering and development firm that provides a one-stop engineering, procurement, and construction (EPC) platform for the renovation and new development of hydroelectric power plants across Japan. Founded in January 2011 by Tanaka Katsuyoshi after 15+ years at Mitsubishi Corporation, the firm has established dominant market share in Japan's Feed-in Tariff (FIT) hydropower renovation market for plants above 1,000kW, with a cumulative track record covering 19 design locations (150MW), 4 EPC contracts (37MW), and turbine-generator procurement for 13 power plants (25 units) at a total procurement value of approximately 20 billion yen. Its service portfolio is organized into four integrated modules — Analyze-M (assessment), Realize-M (design), EPC-Mirai (procurement/construction), and EPC Management-Mirai (supervision) — supported by environmental certificate (non-fossil certificate) trading and capital deployment through the Mirai Hydropower Investment LP funds, where Mirai acts as general partner.

The customer base spans private hydroelectric operators, municipal governments, and public electric utilities across Japan (Hokkaido to Kyushu), with flagship long-term engagements including the joint renovation of the Horoman River No. 2 and No. 3 plants with Nippon Dento in Samani Town, Hokkaido, and small hydropower development with Tsunan Town, Niigata Prefecture. Revenue derives from project-based consulting and EPC fees, GP management fees and carry on the Mirai Hydropower investment LP funds (initial fund targeted at 5 billion JPY; second fund with additional capital injections in March 2024 and April 2025), and environmental certificate trading. The firm holds a regulated license stack — financial instruments business, special class construction contractor, construction consultant, and Japan Electric Power Exchange non-fossil certificate dealer — that few competitors replicate.

In March 2024 the company renamed itself Mirai Partners Co., Ltd. and split operations into the Mirai Energy Partners Division (hydropower engineering, development, and operation) and Mirai Construction Partners Division (newly licensed construction services including mountain civil engineering, river disaster prevention, and bridge work). The firm is privately held, registered capital is 88 million JPY, and major shareholders include Mitsubishi Corporation, Sumitomo Mitsui Banking Corporation, Osaka Gas, SMFL Mirai Partners, and NCS RE Capital. Headcount is in the 11–50 range, with external directors drawn from SMFL Mirai Partners and NCS RE Capital.

Name

Mirai Energy Partners

Legal name

みらい・パートナーズ株式会社

Website

https://mirai-energy-partners.jp

Company type

Private

Founded year

2011

Operating status

Operating

Headcount range

11–50 employees

Short description

Mirai Energy Partners is a Tokyo-based hydropower engineering firm providing one-stop EPC, asset assessment, and investment-fund services for the renovation and new development of hydroelectric power plants across Japan, serving private operators, municipal governments, and public utilities.

Ownership category

akta.pro rank

Product category

Hydropower EPC and Renewable Energy Services

NAICS

Hydroelectric Power Generation (221111), Electric Power Generation (22111)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623), Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Hydropower Plant EPC (Dam, Run-of-River, Pumped Hydro Civil Works) (EUAEAAAD)

akta.pro secondary industries

Hydro Balance-of-Plant EPC (Penstocks, Gates, Intake/Outfall, Auxiliaries) (EUAEADAH), Hydropower EPC & Construction (Civil Works, Electromechanical) (EUACAEAF), Hydropower EPC & Civil Construction (Dams, Weirs, Tunnels, Penstocks) (EUAMADAB), Temporary Construction Utilities & Logistics (Laydown Yards, Temporary Power, Transport) (EUAMAFAL)

Keywords

• Hydroelectric engineering
• EPC construction
• Renewable energy development
• Hydropower renovation
• Investment fund management

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D

Revenue model

1. Construction Consulting (建設コンサルタンツ業務): Survey, measurement, preliminary and detailed engineering design, permit acquisition, and FIT/制度金融 scheme evaluation for hydropower renovation projects. Billed as professional service engagements with private operators and public utilities.
2. EPC (Engineering, Procurement, Construction) Services: Full turnkey construction contracts for hydropower plant renovation and new development, including civil works, mechanical/electrical equipment procurement, installation, and commissioning. Revenues recognized as one-time project-based contracts.
3. Investment Advisory and Capital Investment (出资・投資顧問業務): Provides investment advisory services and equity capital to special purpose companies formed for hydropower energy projects. Acts as GP (unlimited liability partner) in the Mirai Hydropower Investment LP, earning management fees and carry from institutional investors.
4. Eligible Institutional Investor Special Exemption Services (適格機関投資家特例業務): Manages the Mirai Hydro Power II Investment LP under Japan's eligible institutional investor exemption framework, providing fund management services to qualified investors.
5. Environmental Certificate Trading (環境証書業務): Procurement and sale of environmental certificates (non-fossil certificates) originating from renewable energy, particularly hydropower, generated under Japan's FIT scheme. Transactions generate trading revenue.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Mirai Energy Partners provides one-stop engineering, procurement, and construction (EPC) services for hydroelectric power plant renovation and new development. Its offerings span hydroelectric engineering design, equipment procurement, construction management, and long-term operation support, complemented by an investment fund (Mirai Hydropower Investment LP) for financing hydropower projects and an environmental certificate trading business.

Product overview

Mirai Energy Partners operates as a platform-plus-divisions structure comprising two main divisions: Mirai Energy Partners (hydropower engineering, development, and operation) and Mirai Construction Partners (construction services). The core service portfolio includes four integrated consulting modules—アナライズ-M (assessment), リアライズ-M (design), EPC-みらい (procurement/construction), and EPC監理-みらい (supervision)—which together provide end-to-end hydroelectric power plant renovation services. Supporting services include environmental certificate trading, investment advisory, and construction services for bridges, river embankments, and mountain roads. The company manages the Mirai Hydropower Investment Fund for hydroelectric renovation and new development projects.

Differentiator

Problem solved

Functional benefit

Brands

• みらいエネルギー・パートナーズ社: Hydroelectric power generation engineering, development, and operations division
• みらい建設・パートナーズ社

Products and services

• Analyze-M

Quantifiable outcome

• Dominant market share in Japan's 1,000kW+ FIT hydropower renovation market
• +3 more outcomes

Named customers3 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

Feature5 records

Partnerships

One partnership is on record.

• 新日本電工株式会社 (Nippon Dento Co., Ltd.)coreStrategic or Co-development Partner · 1 February 2015Long-term business co-development partner for the renovation and management of the Homan River No. 2 and No. 3 hydroelectric power stations in Samani Town, Hokkaido. Mirai provides full renovation project management while Nippon Dento provides the existing facility assets and operational infrastructure. Power stations achieved FIT commercial operation: No. 2 in November 2017, No. 3 in February 2019.

Scale indicators9 records

Recent moves8 records

Expansion highlights6 records

Broad incumbents

• Electric Power Development Co. (J-POWER): Japan's largest wholesale electricity generator with a major hydropower portfolio and in-house EPC capabilities. Overlaps with Mirai on hydro asset ownership and project development in Japan, though J-POWER operates at much larger scale and across multiple generation technologies.
• IHI Corporation: Japanese heavy industrial manufacturer with hydropower turbines and infrastructure equipment. Competes as a turbine-generator supplier in the same procurement competitions Mirai manages on behalf of hydro operators.
• Shimizu Corporation: Large Japanese general contractor active in hydropower civil works, dams, and tunnel construction relevant to Mirai's balance-of-plant scope. Competes for hydro EPC work alongside its broader construction business.
• Obayashi Corporation: Major Japanese general contractor with renewable energy EPC experience including small hydropower and dam construction. Competes for the same municipal and private hydro renovation opportunities as Mirai but as part of a much broader construction portfolio.
• Toda Corporation: Japanese general contractor with civil engineering capabilities spanning dams, bridges, and energy infrastructure. Overlaps with Mirai's hydro and bridge construction divisions but serves a broader construction market.
• Hazama Ando Corporation: Japanese construction major with hydropower, dam, and civil engineering projects. Comparable to Mirai on the construction side of hydro EPC, though without the fund management overlay.
• Kansai Electric Power Co., Inc. Major Japanese utility with significant hydropower assets and in-house engineering for renovation. A potential customer/competitor depending on whether it procures external EPC for its hydro fleet or insources work.
• Hitachi Mitsubishi Hydro Corporation: Joint venture between Hitachi and Mitsubishi for large and small hydropower turbine-generator equipment. Participates in the same turbine-generator manufacturer competitions that Mirai orchestrates for its renovation clients.

Direct peers

• Sumitomo Mitsui Construction Co., Ltd. Japanese contractor with active hydropower and renewable energy engineering capabilities. The most directly comparable construction peer to Mirai on civil and balance-of-plant hydro work, though lacking Mirai's fund management platform.

Emerging players

• Kawasaki Heavy Industries, Ltd. Japanese industrial manufacturer with small hydropower equipment and gas turbine capabilities. Comparable as a potential technology partner or competitor in the small-hydro equipment supply chain that Mirai's EPC business orchestrates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds1 record

Investors3 records

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 Mirai Energy Partners