Sankosha Corporation

What Sankosha Corporation does

Sankosha Corporation is a Tokyo-headquartered Japanese manufacturer specializing in lightning protection technology, telecommunications infrastructure equipment, and environmental monitoring systems, with operations dating to 1930. The company's product portfolio is anchored in three interlocking domains: (1) Surge Protective Devices (SPDs) and lightning arresters — including the MZSR/MZS/MZG power SPD series, ZP communication SPDs (UL-certified), LAN SPDs, coaxial SPDs, and ceramic arresters/GDTs — designed to protect electrical, telecommunications, and network infrastructure from lightning-induced surges; (2) Grounding systems — featuring the proprietary SAN-EARTH M5C conductive concrete (with approximately 20 years of in-situ stability data at the Sagamihara Techno Center), the newer biomass-based BIO SAN-EARTH BC1, SANFLEX coated grounding wire, and SANMAT carbon fiber mat — used in railway, power utility, and renewable energy installations; (3) Partial discharge measurement and insulation diagnostics — including the Prime PD-Guard continuous monitoring system, MS Pico portable spot measurement device, Doble Engineering distributed instruments (MYRKOS, CALISTO, M4100, M5500), and PDSolver AI-powered diagnostic software (co-developed with Ampacimon). Supporting offerings include hybrid energy storage systems, battery monitoring, aviation obstacle lights, network cabling accessories (Roxtec, KRONE, R&M), and JLDN, a 31-sensor Japan-wide real-time lightning observation network.

Name

Sankosha Corporation

Legal name

株式会社サンコーシヤ

Website

https://sankosha.co.jp

Company type

Private

Founded year

1930

Operating status

Operating

Headcount range

1–10 employees

Short description

Sankosha Corporation is a 90-year-old Japanese manufacturer of lightning protection equipment, surge protective devices, grounding systems, and partial-discharge diagnostics serving railway operators, power utilities, telecommunications carriers, and renewable energy developers across Japan and eight international markets.

Ownership category

akta.pro rank

Product category

Lightning Protection Equipment

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Relay and Industrial Control Manufacturing (335314)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600), Electrical Industrial Apparatus (3620), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

Grounding, Bonding & Lightning Protection (grounding bars, clamps, earthing systems, lightning arrestors) (IMAGAEAJ)

akta.pro secondary industries

Surge Protectors & Power Strips (SPD) (HDACAJAB), Electrical Surge, Lightning Damage & Power Quality Troubleshooting (HSAOAEAD)

Keywords

• Lightning protection equipment
• Surge protection devices
• Grounding systems materials
• Partial discharge diagnostics
• Earthing engineering services

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices20 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Lightning Protection Equipment Sales: Sale of SPDs (Surge Protection Devices), lightning arresters, ceramic arresters, GDTs, and related lightning protection hardware. Products include power SPDs, communication SPDs, LAN SPDs, coaxial SPDs, and explosion-proof SPDs.
2. Earthing/Grounding Systems and Materials Sales: Sale of grounding resistance reducing materials (SAN-EARTH M5C, BIO SAN-EARTH), grounding components (SAN-Flex lines, SAN-Mat, winged earth electrodes, sea electrodes), and grounding construction services.
3. Earthing Construction Services: Provides complete grounding solutions including investigation, design, construction, and post-construction measurement. Domestic and international construction services for power plants, substations, renewable energy facilities, railways, and telecommunications infrastructure.
4. Partial Discharge Measurement and Insulation Diagnostics Services: On-site partial discharge measurement and insulation degradation diagnostic services using proprietary noise processing and AI tools. Also provides monitoring services for high-risk critical equipment. Measurement data analysis and diagnostic reporting.
5. Power Equipment Products and Diagnostics: Sale of power monitoring equipment, battery management systems, hybrid energy storage systems, and power equipment diagnostic tools including dissolved gas analysis (DGA) instruments and frequency response analyzers.
6. Telecommunications and Network Equipment: Sale of telecommunications equipment, network infrastructure components, aviation obstacle lights, and related products.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Sankosha Corporation manufactures and sells lightning and surge protection devices (SPDs, arresters, GDTs), grounding resistance reducing materials and systems, partial discharge measurement and insulation diagnostic equipment, and telecommunications/network infrastructure equipment. The company also provides integrated engineering services for grounding construction and on-site partial discharge diagnostics. Its product portfolio addresses protection of critical infrastructure including railways, electric power systems, telecommunications, and industrial plants.

Product overview

Sankosha Corporation is a comprehensive manufacturer providing lightning protection technology and electrical/telecommunications infrastructure equipment. Its product portfolio centers on several interlocking domains: (1) Surge Protective Devices (SPDs) — encompassing power SPDs (MZSR, MZS, MZG series), communication SPDs (ZP series), LAN SPDs, coaxial SPDs, and ceramic arresters (GDTs) — for protecting electrical and communications equipment from lightning surges; (2) Grounding Systems — including SAN-EARTH M5C and BIO SAN-EARTH BC1 ground resistance reduction materials (conductive concrete), SANFLEX wire (conductive coated wire), SANMAT (carbon fiber mat), grounding electrodes (wing-type earth, sea electrode, Santoi earth), and construction methods (spiral earth, boring, pile-driving, paste application); (3) Partial Discharge Measurement Equipment — including Prime PD-Guard (continuous monitoring), MS Pico (portable spot measurement), M4100 and M5500 frequency response analyzers, and MYRKOS/CALISTO dissolved gas analyzers — for insulation deterioration diagnosis; (4) Power Supply & Management — including hybrid storage systems, battery testers, online battery monitoring, and emergency/portable power; (5) Network Communications Equipment — including ROXTEC cable sealing, KRONE/LSA-PLUS terminal products, and R&M modules; and (6) Meteorological Observation and Other Infrastructure — including aviation obstacle lights and weather observation systems. The company also offers integrated engineering services in grounding and partial discharge diagnosis.

Differentiator

Problem solved

Functional benefit

Brands

• サンアース (SAN-EARTH): 導電性コンクリートタイプの接地抵抗低減材ブランド。带状施工向けの粉体接地抵抗低減材で、長期的に安定した接地抵抗を得る事ができる。
• バイオサンアース (BIO SAN-EARTH)
• JLDN (Japan Lightning Detection Network)

Products and services

• SAN-EARTH M5C Conductive Concrete Grounding Material Ground resistance reduction material (conductive concrete type) applied to grounding electrodes to lower earth resistance, prevent electrode corrosion, and facilitate smooth dissipation of lightning surge currents into the earth. Has approximately 20 years of stable data at Sagamihara Techno Center.
• BIO SAN-EARTH BC1 Biomass-based Grounding Material Environmentally-conscious ground resistance reduction material using biomass power generation byproducts (biochar) as conductive material. Reduces CO2 emissions by approximately 21% compared to SAN-EARTH M5C while maintaining equivalent grounding performance.
• Prime PD-Guard Continuous Partial Discharge Monitoring System Fixed (IoT-type) remote monitoring system for continuously measuring partial discharge in transformers and other substation equipment. Supports online monitoring with email alerts on abnormality detection.
• MS Pico Portable Partial Discharge Spot Measurement Device Portable spot measurement device for capturing partial discharge in live power cables (1kV–500kV), transformers, motors, and switchgear. Features noise suppression and automated partial discharge type identification (corona, internal PD, surface discharge).
• Power SPD (Surge Protective Device) - MZSR, MZS, MZG Series Surge protective devices for power systems including Class I, II, III products for AC 100/200V single-phase, three-phase 3-wire, and three-phase 4-wire configurations. UL certified and compliant with Japanese public building standards.
• Communication & LAN SPD (ZP Series and LAN-1000IS-2, LAN-CAT6A-P+II(R)) Surge protective devices for telecommunications lines (ZP series with UL certification) and LAN networks (Cat6A-compatible), including models with degradation diagnosis capability.
• N-JP-8.5G Coaxial SPD (8.5GHz compatible) Coaxial surge protective device compatible with 8.5GHz frequency band for high-frequency applications.
• SM10-003 Surge Monitor Surge monitoring device for tracking and recording lightning surge events.
• Hybrid Storage System (Hybrid Energy Storage) Hybrid energy storage system combining lithium-ion batteries (for cycle performance and renewable energy integration) with lead-acid batteries (for cost-effective long-duration backup during power outages). Designed for disaster resilience and stable power supply.
• SANFLEX Wire (Conductive Coated Grounding Wire) Fully sealed (waterproof) grounding electrode using conductive coated wire. Eliminates corrosion risk from moisture in soil, providing long service life compared to bare copper stranded wires.
• SANMAT Carbon Fiber Mat Grounding Material Non-woven carbon fiber mat grounding material that increases contact surface area between electrode and soil, achieving grounding resistance comparable to SAN-EARTH strip construction. Risk assessment exempt material.
• Partial Discharge Measurement and Insulation Diagnostic Service On-site partial discharge measurement and insulation deterioration diagnosis service conducted by company technicians, including data analysis and diagnostic reporting. Also offers continuous monitoring services with permanent installations. Over 1000 measurement locations worldwide.
• Grounding Engineering Service Complete grounding solutions encompassing earth resistivity measurement (Wenner 4-electrode method), grounding design using ρ-a curves, construction, and post-construction resistance measurement. Available in Japan and internationally (Thailand, Indonesia, Vietnam).

Quantifiable outcome

• SAN-EARTH grounding material maintains stable resistance of 12-34Ω over approximately 20 years (measured at Sagamihara Techno Center, with a maximum of 34Ω and minimum of 12Ω)
• +4 more outcomes

Named customers11 records

Segments6 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability3 records

Feature7 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• Ampacimon S.A.coreTechnology or Integration · 1 January 2019Partnership with Ampacimon S.A., a Belgian company (formerly DIAEL, founded from Madrid Polytechnic University research project in 2010). Ampacimon specializes in grid optimization monitoring solutions and is a global leader in high-voltage power cable partial discharge measurement and degradation diagnostics. The partnership enables Sankosha to offer industry-leading partial discharge detection with statistical noise processing and AI-powered diagnostics (PDSolver).
• Doble Engineering CompanycoreTechnology or Integration · 1 January 2006Sankosha serves as the Japanese general agent (日本総代理店) for Doble Engineering Company, established in 1920. Doble is a leading US company in power equipment diagnostics, maintenance, and consulting. The partnership, dating from 2006, covers diagnostic equipment distribution and degradation diagnostic services. Products include PD-Guard continuous monitoring, MYRKOS dissolved gas analyzers, CALISTO instruments, M4100 insulation diagnostic testers, and M5500 frequency response analyzers.
• Franklin Electric (via Franklin Japan)coreTechnology or IntegrationFranklin Electric provides online monitoring devices/systems for power, water, and industrial markets. Sankosha group company Franklin Japan operates the JLDN lightning observation network and provides weather data services. Products include battery management systems (CELLTRON ADVANTAGE CAD-5000JP, battery monitoring systems).
• Commscope (formerly KRONE)minorChannel Partner/ Reseller/ DistributorCommscope is a global information and communications technology equipment manufacturer. Sankosha is a Japanese authorized agent (日本正規代理店) for Commscope's KRONE LSA-PLUS terminal products and related communication infrastructure components including MDF modules, profile frames, patch plugs, and T-DUX cable waterproofing devices.
• R&M (R&M Kabelfesthalter AG)minorChannel Partner/ Reseller/ DistributorSwiss precision telecommunications equipment manufacturer. Sankosha is a Japanese authorized agent (日本正規代理店) for R&M products including VS Compact mounting hardware, tools, designation strips, patch plugs, and test/connection cords.
• Roxtec International ABminorChannel Partner/ Reseller/ DistributorSwedish company specializing in cable and pipe sealing solutions. Sankosha handles Roxtec products including ROXTEC frame systems for cable sealing in network engineering applications.
• Alpha Paint (Alpha Paint Co., Ltd.)minorChannel Partner/ Reseller/ DistributorJapanese company providing high-performance coatings including rust conversion coatings and heat-reflective coatings. Products include Select Coat N300 rust conversion paint, Select Coat N330 metal silver rust conversion paint, and Select Coat E350 primer for rust prevention.
• L.V. Control Sdn. Bhd.coreStrategic or Co-development PartnerMalaysian company acquired by Sankosha in December 2021. Develops, manufactures, and sells lightning protection products, external lightning protection equipment, distribution panels, and cabinets. Serves as Sankosha's Southeast Asian manufacturing hub.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Phoenix Contact: Phoenix Contact is a German specialist in industrial connectivity, surge protection, and signal conditioning. Its TERMITRAB and PLUGTRAB SPD product lines compete with Sankosha's ZP and MZSR series, particularly in industrial automation and telecom applications.
• Raycap: Raycap is a US-based specialist in surge protection for telecom, renewable energy, and transportation markets, including railway signaling. Its Strikesorb and similar products compete with Sankosha's MZSR and ZP series for similar enterprise customers.
• CITEL: CITEL is a French surge protection specialist serving telecom, photovoltaic, and industrial applications. It competes with Sankosha in SPDs for telecom and renewable energy markets, with particular strength in European PV applications where Sankosha's BIO SAN-EARTH could also be relevant.
• nVent Electric (ERIFLEX): nVent's ERIFLEX brand offers grounding, bonding, and surge protection solutions including conductive concrete grounding materials — directly comparable to Sankosha's SAN-EARTH product line. nVent is a publicly-traded US peer with broader electrical enclosure and connection portfolios.
• DEHN SE: DEHN is a German family-owned specialist in lightning protection, surge protection, and earthing — the closest direct peer to Sankosha globally. Both companies focus on SPDs, grounding materials, and external lightning protection systems for railways, power utilities, and industrial customers, with comparable one-stop engineering service models.

Broad incumbents

• Siemens Smart Infrastructure: Siemens provides surge protection and electrical infrastructure solutions within its Smart Infrastructure division, competing for the same railway and utility customers as Sankosha, especially in European and Asian markets where it has strong incumbency.
• Schneider Electric: Schneider Electric provides surge protection and electrical distribution solutions within its energy management portfolio, including Acti9 SPDs. It competes with Sankosha in commercial, industrial, and utility applications globally.
• ABB: ABB offers surge protection devices, electrical distribution, and grid infrastructure products as part of its broader electrification portfolio. While not a lightning-protection specialist, ABB competes with Sankosha in SPDs and electrical apparatus for utility, railway, and industrial customers globally.
• Eaton: Eaton offers SPDs and power quality products as part of its broader electrical portfolio (e.g., Bussmann series), competing with Sankosha in surge protection for data centers, telecom, and industrial facilities across global markets.

Emerging players

• Doble Engineering Company: Doble Engineering is Sankosha's own Japanese general agency partner (since 2006), providing PD-Guard monitoring, MYRKOS dissolved gas analyzers, and CALISTO instruments. As a power equipment diagnostics specialist, it serves overlapping utility customers — making it both a partner and a partial peer in the diagnostics segment.

Market position

Strengths1 record

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/sankosha-corporation

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries24 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 Sankosha Corporation