What Denyo Kogyo does

Denyo Kogyo Co., Ltd. (株式会社電溶工業) is a privately held Japanese industrial-equipment manufacturer founded in December 1967 and headquartered in Yamanashi Prefecture. The company designs and produces electric resistance welding machines — primarily X-type and C-type servo guns (TMX and TMC series), elevator guns, nut-welding guns, transformers, robot-pat guns, welding cables, arms, and tip electrodes — which are integrated into automotive and general industrial production lines for high-precision spot welding. Its principal differentiator is the proprietary cam mechanism in the J-GUN robotic spot welder, which actively controls weld-tip motion to limit electrode misalignment and degradation, extending weld-quality consistency compared with conventional servo guns. Manufacturing is fully integrated in-house, from casting and machining through assembly and quality assurance, using coordinate measuring machines and is operated under ISO 9001:2015 certification since July 2017.

The company's commercial model is custom-engineered B2B hardware sales: each welding machine or line is built to the customer's specification, priced via quotation rather than disclosed list price, and contracted through multi-year supply arrangements with automobile OEMs and Tier-1 suppliers. Denyo runs direct field-sales via Japanese branch offices (Nagoya/Aichi, Northern Kanto/Tochigi, Nagasaki Technical Center) and wholly-owned subsidiaries in Kunshan (China), Ohio (USA), Gurgaon and Pune (India), and Bangkok (Thailand). Named end-customer relationships include FANUC, Nachi-Fujikoshi, Yaskawa Electric (robot OEMs displaying Denyo guns at trade shows) and Honda Motor (China) Technology, which awarded Denyo's Kunshan subsidiary a Contribution Award in March 2025.

In March 2026 Denyo announced acquisition of the welding machine business of Furukawa Electric Power Systems Co., Ltd., expected to close March 31, 2026, which will expand its product portfolio. In the same month the company announced Japan's first hydrogen-gas-powered gas lamp system, developed with the Yamanashi Industrial Technology Center. The firm is family-controlled by the Nakamura family (President Akio Nakamura, Executive Director Toshiyuki Nakamura, Chairman Haruo Nakamura), with registered capital of 40 million yen and no external PE/VC/strategic investor disclosed.

Name

Denyo Kogyo

Legal name

株式会社電溶工業

Website

https://denyojp.com

Company type

Private

Founded year

1967

Operating status

Operating

Headcount range

11–50 employees

Short description

Denyo Kogyo is a privately held Japanese manufacturer of electric resistance spot-welding guns (X-type and C-type servo guns, transformers, electrodes) sold to global automotive OEMs and Tier-1 suppliers via wholly-owned subsidiaries across Japan, China, India, the USA, and Thailand.

Ownership category

akta.pro rank

Product category

Industrial Resistance Welding Equipment

NAICS

Welding and Soldering Equipment Manufacturing (333992), Metalworking Machinery Manufacturing (33351)

SIC

Electrical Industrial Apparatus (3620), Special Industry Machinery (No Metalworking Machinery) (3550)

akta.pro primary industry

Welding, Joining & Soldering Equipment (Arc, Resistance, Friction, Brazing) (IMAHADAH)

akta.pro secondary industry

Welding & Plasma Power Supplies (Industrial welders, cutting power sources) (IMAGADAI)

Keywords

• Resistance welding machines
• Spot welding guns
• Servo welding equipment
• Automotive welding systems
• Robotic welding guns

Headquarters

HQ city

Yamanashi

HQ country

Japan

HQ region

Asia

Offices9 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Welding Machine Manufacturing and Sales: Manufacture and sale of electric resistance welding machines (spot welding guns) for automobile manufacturers and various industrial production factories. Products include servo guns, portable guns, multi-guns, transformer-equipped robot-pat guns, various transformers, welding cables, arms, tip base electrodes, and other welding parts.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Denyo Kogyo manufactures and sells electric resistance welding machines (spot welding guns) primarily for automobile manufacturers and industrial production factories. The portfolio includes X-type servo guns (TMX series), C-type servo guns (TMC series) in various configurations, the proprietary J-GUN robotic spot welder with a cam mechanism that controls weld tip motion, transformers, welding cables, arms, and tip base electrodes. An in-house integrated production system covers casting, machining, assembly, and quality assurance.

Product overview

Denyo Kogyo manufactures and sells electric resistance welding machines (spot welding guns) primarily for automobile manufacturers and various industrial production facilities. The product portfolio includes X-type servo guns (TMX series) and C-type servo guns (TMC series) in various configurations such as lightweight, standard, large-type, nut welding, and elevator types. The company operates an integrated in-house production system covering casting, machining, assembly, and quality assurance, enabling rapid prototyping and flexible customization. Products are designed for high-precision, high-efficiency welding of metal components with features including compact/lightweight body and high-speed operation through proprietary cam mechanisms.

Differentiator

Problem solved

Functional benefit

Products and services

• X type servo gun TMX-1452 series X-type servo gun in low-weight configuration for electric resistance spot welding, designed for use in automobile production lines.
• X type servo gun TMX-1518 series Standard X-type servo gun for electric resistance spot welding applications in automotive manufacturing.
• X type servo gun large type TMX-1368-F series Large-format X-type servo gun designed for heavy-duty spot welding applications in vehicle manufacturing.
• C type servo gun TMC-910 series Lightweight C-type servo gun for compact welding applications in automotive assembly lines.
• C type servo gun TMC-302 series Standard C-type servo gun for electric resistance spot welding in automobile production facilities.
• C type servo gun large type TMC-1056-1 series Large-format C-type servo gun for high-capacity spot welding operations in vehicle manufacturing.
• C type servo gun nut welding type TMC-1094 series Specialized C-type servo gun designed for nut welding applications in automotive assembly.
• Elevator servo gun TMC-1273 series Elevator-type servo gun for vertical welding applications in automobile manufacturing lines.
• J-GUN Robotic Spot Welder Robotic spot welder with proprietary cam mechanism that controls weld tip motion to prevent weld quality deterioration and maintain consistency longer than conventional welders. Features compact, lightweight body that works with smaller robots to lower production cost.
• Integrated Production System In-house production capability covering casting, machining, assembly, and quality assurance, enabling rapid prototyping and flexible delivery scheduling for customized welding equipment.
• Gem Specifications Custom Engineering Custom-engineered spot welding machines optimized for specific production line requirements, featuring compact, lightweight, high-speed performance with proprietary mechanisms tailored to customer specifications.

Quantifiable outcome

• J-GUN maintains weld quality consistency longer than conventional welders, reducing production costs through compact and light-weight design compatible with smaller robots

Named customers5 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Furukawa Electric Power Systems Co., Ltd. (古河電工パワーシステムズ株式会社)coreStrategic or Co-development Partner · 26 March 2026Denyo Kogyo acquired the entire welding machine business from Furukawa Electric Power Systems Co., Ltd., effective March 31, 2026. This includes servo guns, portable guns, multi-guns, transformer-equipped robot-pat guns, various transformers, welding machine cables, arms, tip base electrodes, and other welding parts. This acquisition significantly expands Denyo's product portfolio and market presence.

Scale indicators8 records

Recent moves16 records

Expansion highlights5 records

Direct peers

• Daihen Corporation: Diversified Japanese manufacturer producing resistance welding machines, welding robots, and power electronics for automotive and industrial OEMs. Competes head-to-head with Denyo in servo-gun and welding-system sales to Japanese auto plants.
• CenterLine (Windsor) Limited: Canadian manufacturer of resistance welding machines, spot welding guns, and consumable electrodes serving automotive and industrial customers globally. Directly comparable product set and custom-engineering business model.
• ARO Welding Technologies: European manufacturer of resistance welding equipment, transformers, and welding guns with deep automotive exposure. Comparable in product portfolio (servo guns, portable guns) and customer type (global OEMs and tier-1 suppliers).
• Obara Corporation: Japan-headquartered specialist in resistance welding equipment and consumables for the automotive industry. Closest direct competitor to Denyo in spot welding guns, transformers, and electrodes, serving the same Japanese OEM customer base.
• T. J. Snow Company: US-based resistance welding equipment manufacturer and integrator supplying spot welding guns, controls, and complete welding cells. Overlaps Denyo's product category and serves North American automotive customers.
• TECNA S.p.A. Italian maker of resistance welding equipment, particularly spot welding guns, transguns, and welding controls. Comparable product offering to Denyo's servo gun line with similar automotive customer focus.

Broad incumbents

• Yaskawa Electric Corporation: Japanese industrial robot OEM that co-displays Denyo welding guns on its robot platforms. Adjacent participant in welding cells with potential to insource; a key channel partner and a structural threat to Denyo's go-to-market.
• Lincoln Electric: Global welding equipment and consumables leader. Has a dedicated resistance welding / robotic welding cell business that competes with Denyo in automotive OEM accounts, though the bulk of its business is arc welding.
• Fronius International: Austrian welding technology major producing resistance spot welding, MIG/MAG, TIG, and laser welding systems. Wider portfolio than Denyo but competes in automotive spot welding guns and integrated welding cells.

Emerging players

• Nachi-Fujikoshi Corp. Japanese robot and component maker that integrates spot welding guns (historically including Denyo's products) into robot cells for automotive customers. A channel partner with capability to expand into gun manufacturing.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/denyo_kogyo

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

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 Denyo Kogyo