What Energy Support does

Energy Support Corporation (エナジーサポート株式会社) is a Japanese electrical equipment manufacturer founded in 1927 and headquartered in Inuyama, Aichi Prefecture. Since 2012 it has operated as a wholly-owned subsidiary of NGK Corporation (日本ガイシ株式会社), one of Japan's leading ceramics and electrical component makers. The company employs 321 people (as of March 31, 2025) and reported ¥16.5 billion in revenue for FY2025 (year ended March 2025).

The company operates three product lines. The Power Distribution Equipment line produces pole-mounted and distribution transformers, gas detectors, current limiters and lightning arresters used by electricity transmission and distribution networks. The Electrical Installation Materials line supplies overhead and underground power-line hardware and related installation supplies. The Measurement Instruments line produces zirconia oxygen sensors and analyzers, magnetic oxygen analyzers, and CO2/O2 concentration meters for industrial combustion and process monitoring — a product pillar built around proprietary zirconia ceramics technology acquired from NGK in 2002 and now central to the company's higher-margin instrumentation business. A manufacturing subsidiary in Zhenjiang, China (Zhenjiang ES (Zhenjiang) Electric Co., Ltd., established 2006) provides offshore capacity.

The business model is direct B2B sales of certified industrial hardware. Customers are concentrated in Japan's ten regulated regional electric power utilities (from Hokkaido Electric Power to Okinawa Electric Power), with secondary demand from JR and private railway operators, semiconductor manufacturers, and heavy industrial customers in steel, cement, petroleum and shipbuilding. Product specifications are anchored to Japanese Industrial Standards (JIS) and Japanese Electrotechnical Committee (JEC) standards, which both enforce quality and create a regulatory barrier to foreign competitors. Revenue is generated through unit sales of hardware with multi-year utility procurement cycles and long product qualification lead times.

Name

Energy Support

Legal name

Energy Support Corporation

Website

https://energys.co.jp

Company type

Private

Founded year

1927

Operating status

Operating

Headcount range

1–10 employees

Short description

Energy Support Corporation (エナジーサポート株式会社) is a Japanese electrical equipment manufacturer producing power distribution equipment, electrical installation materials, and zirconia-based measurement instruments for Japan's regulated electric utilities, railways, semiconductor firms, and heavy industrial customers.

Ownership category

akta.pro rank

Product category

Power Distribution Equipment

NAICS

Switchgear and Switchboard Apparatus Manufacturing (335313), Electrical Equipment Manufacturing (33531), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Electrical Equipment Manufacturing (3353)

SIC

Switchgear & Switchboard Apparatus (3613), Electronic & Other Electrical Equipment (No Computer Equip) (3600), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

High-Voltage Electrical Systems (Switchgear, Transformers, Protection & Control) (EUAEAFAA)

akta.pro secondary industries

Power Conditioners & Voltage Regulators (HDACAJAD), Power Quality, Metering & Monitoring (HDACAJAG)

Keywords

• Power distribution equipment
• High-voltage switchgear
• Current-limiting fuses
• Zirconia oxygen analyzers
• Lightning protection equipment

Headquarters

HQ city

Inuyama

HQ country

Japan

HQ region

Asia

Offices10 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Power Distribution Equipment (配電機器製品): Sale of switchgear, cutouts, fuses, lightning protection equipment, and SVG (Static Var Generator) to domestic power utilities. Products include overhead line switches, transformer protection equipment, and other distribution quality improvement devices.
2. Electrical Installation Materials (電設資材製品): Sale of high-voltage equipment including SOG (overhead high-voltage air switches), underground switches (UCLD), high-voltage cutouts (PC), current-limiting fuse load switches (LBS), high-voltage fuses, and high-voltage distribution arresters to factories, railways (JR and private), convenience stores, and other facilities.
3. Measuring Instruments (計測機器製品): Sale of zirconia oxygen analyzers (O2 meters), furnace atmosphere analyzers for reductive atmosphere furnaces (CP meters), and light scattering dust concentration meters. Target customers include semiconductor manufacturing equipment makers, automotive parts makers, power companies (thermal power plants), steel makers, cement makers, oil refineries, shipbuilders, waste incineration operators, and various industrial plants.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels5 records

Core offering

Energy Support Corporation manufactures and sells three categories of products for electric power utilities and industrial customers: (1) Power Distribution Equipment including overhead line switches, transformer protection cutouts/fuses, and lightning arresters; (2) Electrical Installation Materials including SOG self-operated switches, UCLD underground switches, high-voltage cutouts, current-limiting fuse load break switches (ENERMIC), high-voltage fuses, and ZnO surge arresters; and (3) Measurement Instruments including zirconia oxygen analyzers for combustion control, CP furnace atmosphere analyzers for heat treatment, and light scattering dust concentration meters for emissions monitoring.

Product overview

Energy Support Corporation is an NGK Group company specializing in three core product categories: (1) Power Distribution Equipment (配電機器製品) covering overhead line switches, transformer protection cutouts and fuses, lightning protection equipment, and SVG static var generators; (2) Electrical Installation Materials (電設資材製品) including SOG (self-operated gauging switches), overhead high-voltage switches, UCLD underground cable switches, PC high-voltage cutouts, LBS current-limiting fuse load break switches, high-voltage fuses, and distribution arresters; and (3) Measurement Instruments (計測機器製品) featuring zirconia oxygen analyzers (O2 analyzers) for combustion control, furnace atmosphere analyzers (CP meters) for heat treatment, and light scattering dust concentration meters for environmental monitoring. The company serves electric power companies, electrical contractors, and industrial customers with products designed for stable power supply and environmental protection.

Differentiator

Problem solved

Functional benefit

Products and services

• Overhead Line Switches (架空線用開閉器) Air switches for 6.6kV overhead distribution lines, available in manual and automatic types with ratings of 200A-600A. Sealed construction with lightning surge element built-in variants. For power utilities and distribution network operators.
• Transformer Protection Equipment (変圧器保護機器) Box-type and cylindrical cutout switches and high-voltage fuses for transformer protection at 6.6kV and 22kV, including tension fuses, time-lag fuses, and double fuses. For power utilities and industrial customers.
• Lightning Protection Equipment (耐雷機材) Lightning protection products including lightning arresters with lightning element-equipped cutouts and lightning horns to reduce equipment damage from thunderstorms. For power distribution infrastructure.
• SVG (Static Var Generator) Static Var Generator for voltage adjustment, power factor improvement, and three-phase imbalance suppression on distribution lines. For power utilities.
• SOG (Self-Operated Gauging Switches / 架空線用高圧気中開閉器) Overhead high-voltage air switches with ground fault and overcurrent detection capabilities, available in standard, VT-built-in, LA-built-in, and combined VT+LA-built-in configurations with 600A series variants. For factories, railways, and commercial facilities.
• Overhead High-Voltage Switches (架空線用高圧開閉器) High-voltage overhead switches including CSS type (sealed manual air switch) and GP type (gas-filled automatic switch) for distribution line switching. For electrical installation contractors.
• UCLD (Underground Cable Load Break Switch / 地中線用自立形高圧開閉器) Self-supporting underground cable switches with standard, VT-built-in, and VT+LA-built-in configurations for underground distribution line switching with weather resistance. For underground distribution systems.
• PC High-Voltage Cutouts (高圧カットアウト) High-voltage cutout switches for protecting distribution lines and transformers, available in standard box type, cylindrical type, salt-resistant type, and special configurations. For power utilities and industrial facilities.
• LBS Current-Limiting Fuse Load Break Switches (限流ヒューズ付負荷開閉器) Load break switches with current-limiting fuses including ENERMIC series with inrush current suppression (automatic and manual types), and PFS-201M-A/205M-A series for cubicle protection. Prevents relay misoperation and momentary voltage drops. For industrial facilities.
• High-Voltage Fuses (高圧ヒューズ) High-voltage fuses including PFG-1S-A and PFU-1 (full-range current-limiting fuses), PFG-1C (wide-range), QC-1 and QCC-1 (capacitor protection), FT/FTS (tension fuses), FL (time-lag fuses), and FWA (double fuses). Industry's smallest and lightest wide-range fuses covering G10 to 100A. For power utilities and industrial facilities.
• High-Voltage Distribution Arresters (高圧配電用アレスタ) RVSQ-6GPS and RVSQ-6GP surge arresters with ZnO elements for protecting equipment from lightning surges, compliant with JEC-2374:2015/JIS C 4608 standards, rated 8.4kV with 2.5kA nominal discharge current. For power distribution systems.
• Zirconia Oxygen Analyzers O2 Meter (ジルコニア式酸素分析計) Zirconia oxygen analyzers for combustion management and atmosphere control, including TF-10, TF-III, TF-IV, LP-30, MLP-10, TF-SD201R, TF-21D201, TF-30, SH-20, SH-30, and SH-IVD series with measurement ranges from ppm to percentage levels. Over half a century of proprietary zirconia sensor development. For semiconductor manufacturers, steel/cement/oil refiners, shipbuilders, waste incineration operators, and thermal power plants.
• Furnace Atmosphere Analyzers CP Meter (還元雰囲気炉用炉気分析計) Atmosphere analyzers for reductive atmosphere furnaces using carbon potential control, including CP and CP-X models for heat treatment quality stabilization and energy efficiency improvement. For steelmakers, heat treatment processors, and automotive parts manufacturers.
• Light Scattering Dust Concentration Meter ISS-101 (光散乱式ダスト濃度計) ISS-101 light scattering dust concentration monitor with 0-10mg/Nm3 range, automatic purge, and auto zero calibration for continuous emission monitoring at boiler chimneys and incinerator outlets. For waste incineration operators and industrial facilities.

Quantifiable outcome

• Over 98% of waste is recycled/reused, demonstrating strong environmental management
• +3 more outcomes

Named customers20 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Partnerships

Five partnerships are on record, tiered core and minor.

• NGK株式会社（日本ガイシ）coreStrategic or Co-development Partner · 1 January 2012NGK Co., Ltd. (formerly NGK Insulators) is the 100% parent company of Energy Support. The relationship provides access to NGK Group's technology, global network (35 group companies in 18 countries), and R&D capabilities. Energy Support was fully acquired by NGK in 2012, delisted from stock exchanges, and operates as an NGK subsidiary within the Energy & Industry business segment. This provides strategic alignment, shared technology platforms (zirconia sensors, ceramics), and global distribution support.
• 全関東電気工事協会coreOthersThe Zenkanto (All Kanto Electrical Construction Association) operates a 'Zenkanto Recommended Product Certification System' for which Energy Support's SOG (overhead high-voltage air switches) have been certified (Certification No. 67, 68, 69). These certified products are primarily used in Tokyo Electric Power's service area.
• 電気安全北陸委員会minorOthersThe Hokuriku Electric Safety Committee recommends specific SOG products for use in the Hokuriku region (Hokuriku Electric Power service area).
• 名古屋ダイヤモンドドルフィンズminorGTM or Marketing PartnerIn 2025, Energy Support signed an official partner contract with Nagoya Diamond Dolphins (B.League professional basketball team) and obtained naming rights for Inuyama City Gymnasium (renamed Energy Support Arena in 2016). This sports sponsorship supports regional brand awareness and community engagement.
• 犬山市minorOthersNaming rights partner for Inuyama City Gymnasium (Energy Support Arena) since 2016, supporting local sports promotion through financial sponsorship.

Scale indicators10 records

Recent moves9 records

Expansion highlights4 records

Broad incumbents

• Eaton: Eaton manufactures power distribution equipment, fuses, and protection products globally. Direct competitor in fuse and switchgear categories, though Eaton's primary market is North America and Europe rather than Japan's utility sector.
• Shimadzu Corporation: Shimadzu manufactures analytical and measuring instruments including gas analyzers and emission monitoring equipment. Comparable to Energy Support's measurement instruments business in industrial and environmental monitoring applications.
• Toshiba Energy Systems & Solutions: Toshiba's power systems division manufactures a broad portfolio of T&D equipment including switchgear, transformers, and protection relays for utilities and industrial customers in Japan and globally. Overlaps with Energy Support on switchgear and transformer protection but serves a much wider portfolio including generation equipment.
• Horiba: Horiba manufactures gas analyzers, emission monitoring systems, and process control instruments for industrial and environmental applications. Overlaps with Energy Support's measurement instruments line, particularly oxygen and dust concentration monitoring products.
• Fuji Electric: Fuji Electric manufactures power distribution equipment, protective relays, and power electronics including static var compensators. Direct overlap with Energy Support's switchgear and SVG product lines, serving Japan's power utilities and industrial customers.
• Schneider Electric: Schneider Electric offers air switches, vacuum circuit breakers, and power quality devices for industrial and utility customers. Competes with Energy Support in power distribution equipment segments, particularly in industrial and commercial applications.
• Mitsubishi Electric Power Distribution Systems Center: Mitsubishi Electric manufactures switchgear, vacuum circuit breakers, and power distribution equipment for Japanese utilities and industrial customers. Major competitor to Energy Support in Japan's power distribution equipment market with broader product breadth and global reach.
• Yokogawa Electric: Yokogawa is a major Japanese manufacturer of industrial measurement and process control instruments, including combustion gas analyzers. Competes with Energy Support's zirconia oxygen analyzer line in industrial process monitoring applications.
• ABB (Hitachi Energy): Hitachi Energy (formerly ABB) is a global leader in power distribution equipment including switchgear, protection equipment, and power quality solutions. Competes with Energy Support in Japanese utility accounts and globally, with substantially larger R&D and product portfolio.

Emerging players

• Daido Steel: Daido Steel's electrical components division manufactures fuses and electrical contacts used in power distribution. Comparable to Energy Support's high-voltage fuse product line, though smaller scale and broader materials focus.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/energy-support-corporation

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries5 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 Energy Support