About Us

Japan’s No.1 engineering consulting company, involved in building infrastructure around the world and supporting people’s safety and security

Since our founding in 1946, we have carried out projects related to the fundamentals of nation-building and human resources development in more than 160 countries. Specialists in various fields come together to respond quickly and accurately to society’s constantly changing needs, with comprehensive capabilities.

Nippon Koei Energy Thailand and Nippon Koei Energy Indonesia operate under Nippon Koei Energy Solutions, a member of ID&E Group. We deliver highest-quality engineering consulting services across all disciplines, taking projects through the entire life cycle, from investigation and design through implementation and operation. We provide one-stop services for clean energy.

Philosophy

Group Management Philosophy

The ID&E Group has grown to the present by continuing to provide solutions to global social issues that change with the times, based on the accumulation of “knowledge” represented by our technologies. We will continue to contribute to the realization of a sustainable society by leveraging the collective strength of the group to provide new technologies and optimal solutions.

Mission

Make the World a Better Place

Always maintaining high aspirations, we will work hard to improve our skills, and provide services based on our accumulated technological capabilities.

ID&E Group is a consulting and engineering company with outstanding technical and management capabilities cultivated through domestic and international infrastructurerelated businesses.

We will continue to be a trusted business partner in various sectors around the globe, providing comprehensive technological services and making the world a better place by creating a sustainable and prosperous future.

Vision

Providing Unique Value as a Company

Evolving into a cohesive, global corporate group Top class worldwide by 2030

The ID&E Group aims to be a consulting and engineering firm that is overwhelmingly No.1 in Japan and top class worldwide. We will evolve into a global corporate group that transcends the differences between people with different backgrounds, places of origin, cultures, etc. and unites them as one.

Values

Tackle your problems with sincerity and the road ahead shall be clear.

“Willingness to Try” “Valuing Speed”
“Entrepreneurial Mindset” “Stakeholder Satisfaction”

As members of the ID&E Group, we want to be useful and help improve the world. To achieve this, we will continue working with sincerity, demonstrating the willingness to try, valuing speed, maintaining an entrepreneurial mindset, and seeking stakeholder satisfaction.

Our Services

Products & Services

Data Center

Renewables

Thermal

Our Projects

Projects

Nava Nakorn Electricity Generating (NNEG) Expansion (60 MW + 30 MW)

The Nippon Koei Energy Thailand team was appointed as Owner’s Engineer (OE) for NNEG Expansion project for both Phase 2 and Phase 3. Scope of work included conceptual design, FEED for Phase 3, EPC tendering and full OE services during execution.

Thermal, Gas, T&D

Nava Nakorn Electricity Generating (NNEG) Expansion (60 MW + 30 MW)

Chonburi Clean Energy (TA – 8.63 MW)

The Nippon Koei Energy Thailand team was appointed as Technical Advisor (TA) and fully integrated to the Project Management Team of the Client for the most advanced and environmentally friendly Industrial Waste-to-Energy Plant in Thailand.

Thermal, Gas, T&D

Chonburi Clean Energy (TA – 8.63 MW)

Chaiyaphum Wind Farm (80 MW)

The Nippon Koei Energy Thailand team was appointed as the Owner’s Engineer (OE) to conduct design review, QA/QC inspection, and construction supervision.

Renewable Energy

Chaiyaphum Wind Farm (80 MW)

Duri Kosambi (T&D – 500KV)

The Nippon Koei Energy Indonesia team was appointed as the Owner’s Engineer (OE) to perform PMC during construction, including detailed design review, QA/QC inspection, and construction supervision.

Thermal, Gas, T&D

Duri Kosambi (T&D – 500KV)

REN Cogen Gas Engine (30MW)

The Nippon Koei Energy Thailand team was appointed as the Owner’s Engineer (OE) to conduct basic engineering design, EPC tender specification and procurement support, then PMC during construction, including detailed design review, QA/QC inspection, and construction supervision.

Thermal, Gas, T&D

REN Cogen Gas Engine (30MW)

Tambak Lorok Block 3 (CCPP) (850MW)

The Nippon Koei Energy Indonesia team was appointed the Owner’s Engineer (OE) to supervise the smooth erection and commissioning of the power plant. The project will supply electricity for large industrial demand in the Java Bali Grid.

Thermal, Gas, T&D

Tambak Lorok Block 3 (CCPP) (850MW)

Nam Phak Hydropower Plant (168MW)

The Nippon Koei Energy Thailand team was appointed as Owner’s Engineer (OE) and also in charge of the Detailed Design for Red Book services. The project comprises two main reservoirs formed by 3 ACC embankments dams and several weirs.

Water

Nam Phak Hydropower Plant (168MW)

Sitanduk Hydropower Project (55MW)

The Nippon Koei Energy Thailand team was engaged to perform feasibility study.

Water

Sitanduk Hydropower Project (55MW)

Kiangan Hydroelectric Plant (8MW)

The Nippon Koei Energy Thailand team was engaged to perform a hydrological study, conceptual and detailed designs.

Water

Kiangan Hydroelectric Plant (8MW)

Bac Lieu & Soc Trang Offshore Wind (172MW)

The Nippon Koei Energy Thailand team was appointed as the Owner’s Engineer (OE) to oversee the development and construction supervision of the nearshore wind farm project in Vietnam.

Renewable Energy

Bac Lieu & Soc Trang Offshore Wind (172MW)

Cirata Floating Photovoltaics (145MW)

The Nippon Koei Energy Indonesia team was appointed as the Project Management Consultant (PMC) to oversee the implementation of Southeast Asia’s largest floating solar plant.

Renewable Energy

Cirata Floating Photovoltaics (145MW)

Hong Phong 4 Solar PV Park (48MW)

The Nippon Koei Energy Thailand team was appointed as the Owner’s Engineer (OE) to conduct basic & detailed engineering design review, EPC procurement support and construction supervision.

Renewable Energy

Hong Phong 4 Solar PV Park (48MW)

News

News & Activities

NKEI Welcomes Nippon Koei Energy Europe CEO to Cirata Floating Solar Power Plant

Enhancing Energy Consulting Capabilities Across Southeast Asia

Marking International Women’s Day 2026: Advancing Inclusion and Leadership in Energy

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Career

Join Us

Wind Manager

Updated

Apr 24, 2026

Civil Engineer – Wind

Updated

Apr 24, 2026

Electrical Designer

Updated

Apr 24, 2026

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Thailand

Nippon Koei Energy (Thailand) Co., Ltd.

142, Two Pacific Place, 19th Floor, Room no. 1903-05, Sukhumvit Road, Khlong Toei Sub-district, Khlong Toei District, Bangkok 10110 - THAILAND

Indonesia

PT. Nippon Koei Energy Indonesia

Menara Sentraya 20th Floor, Jalan Iskandarsyah Raya No. 1A Blok M-Kebayoran Baru Jakarta 12160, Indonesia

Vietnam

The Rep Office of Nippon Koei Energy (Thailand) Co., Ltd. in Vietnam

3rd Floor, Hoang Cau Skyline Building, 36 Hoang Cau Street, O Cho Dua Ward, Hanoi, Vietnam

Global Network

Nippon Koei Headquarter Japan

5 Chome-4 Kojimachi, Chiyoda City, Tokyo 102-8539, Japan

Global Network

Nippon Koei Co., Ltd. Manila Office

Unit 3301 & 3302, 33rd Floor, Corporate Finance Plaza, Ruby Road cor. Topaz Street, Ortigas Center, Brgy. San Antonio, Pasig City, Metro Manila, 1605

Global Network

Nippon Koei Energy Europe B.V.

Conradstraat 38 D6.126, 3013 AP Rotterdam, The Netherlands

Contact Us

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