JST

What JST does

JST Group (JSTグループ) is a privately-held Japanese industrial conglomerate comprising four companies under parent Wakamiya Co., Ltd. (established 2010): JST Co., Ltd. (real estate, parking, solar power), Nippon Tettō Kōgyō Kabushiki Kaisha / Japan Steel Tower Industries (founded 1922 in Kitakyushu), and Nihon Tettō Ōmori Kōjō (bolt and nut manufacturing, est. 1980). Its core business is design, fabrication, galvanizing, and erection of steel transmission/communication towers and major bridges for Japan's electric utilities, MLIT regional bureaus, prefectural governments, and JR East, combined with precision bolt manufacturing and full lifecycle maintenance and longevity services.

The group's technology center is the world's first hollow steel tube transmission tower developed jointly with Kyushu Electric Power in 1965, which reduces wind-load coefficient to 1.6 versus 2.0 for angular steel towers and supports economical 220–500kV+ designs. Proprietary technologies include NT-DEC® 4-layer composite-coated bolts, N-Petal® anti-loosening fasteners, SJS-H low-noise expansion joint removal, TowerCableResp dynamic response analysis software, MIPSON bridge full-scale analysis, PIXXIS 3D measurement, and the NT-Steel Structure Longevity System for in-service inspection, partial zinc repair, and member replacement. Combined production capacity reaches 49,000 t/year across two Kitakyushu sites; the Ōmori Factory operates a hot-dip galvanizing robot system. Notable precision milestones include Tokyo Skytree steel assembly within 2 cm tolerance at 634 m height.

Revenue derives from project-based infrastructure contracts (one-time license) with electric utilities and government agencies for tower/bridge design-build, recurring maintenance and longevity service contracts, hardware sales of bolts and fasteners, hot-dip galvanizing processing services, plus real estate development/management (Shinsuna Plaza, Akasaka Intercity AIR), large-scale parking near driver licensing centers, and megawatt-scale solar power generation. The group sells exclusively through direct enterprise sales via Tokyo headquarters and five regional sales offices (Sendai, Osaka, Hiroshima, Fukuoka, Okinawa). Pricing is contract-based and not publicly disclosed.

Name

JST

Legal name

JST株式会社 (JST Co., Ltd.)

Website

https://jsteam.jp

Company type

Private

Founded year

1922

Operating status

Operating

Headcount range

1–10 employees

Short description

JST Group is a 100-year-old Japanese industrial conglomerate operating across steel transmission-tower and bridge design-build, precision bolt manufacturing, hot-dip galvanizing, real estate development, parking operations, and solar power generation, serving electric utilities, MLIT, prefectural governments, and JR East.

Ownership category

akta.pro rank

Product category

Steel Infrastructure Construction

NAICS

Bolt, Nut, Screw, Rivet, and Washer Manufacturing (332722), Architectural, Engineering, and Related Services (5413)

SIC

Heavy Construction Other Than Bldg Const - Contractors (1600), Bolts, Nuts, Screws, Rivets & Washers (3452), Operative Builders (1531)

akta.pro primary industry

Switching Stations & Reactive Power Facilities (Capacitor Banks, SVC/STATCOM) (IMAFAHAH)

akta.pro secondary industries

Steel Joists, Joist Girders & Decking (IMADACAC), High-Voltage Electrical Systems (Switchgear, Transformers, Protection & Control) (EUAEAFAA), Renewable Energy Asset O&M (Wind, Solar, Hydro, Geothermal) (EUAEAGAB)

Keywords

• Steel tower manufacturing
• Steel bridge construction
• Precision fastener manufacturing
• Real estate development
• Solar power generation

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices9 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Real Estate Development and Management: Development, management, and leasing of high-rise office buildings, large shopping centers, and rental condominiums. Revenue from property sales, leasing income, and property management fees.
2. Parking Lot Operations: Operation of large-scale parking facilities near driver licensing centers. Revenue from hourly and monthly parking fees.
3. Solar Power Generation: Large-scale megawatt solar power generation operations contributing to clean energy and environmental sustainability.
4. Steel Tower Design, Manufacturing, and Construction: Design, fabrication, and on-site erection of transmission and communication steel towers. Revenue from project-based contracts with electric power utilities. Includes one-stop service from design through construction.
5. Steel Bridge Design, Manufacturing, and Erection: Design, fabrication, and erection of major steel bridges including cable-stayed, suspension, arch, and truss bridges. Revenue from large-scale infrastructure project contracts with government agencies and power companies.
6. Steel Structure Maintenance and Longevity Services: Inspection, diagnosis, repair, reinforcement, and long-term maintenance of existing transmission towers and bridges. Revenue from maintenance contracts and repair services.
7. Bolt, Nut, and Fastener Manufacturing and Sales: Manufacturing and sale of precision bolts, nuts, anchor bolts, high-strength bolts, and specialized fasteners for steel towers, bridges, steel structures, and railways. Includes NT-DEC® bolts and N-Petal® anti-loosening products.
8. Hot-Dip Galvanizing Services: Hot-dip galvanizing processing services for steel components. JIS-certified operations for both the steel tower factory and Omori bolt factory. Also accepts outsourced galvanizing contracts from external customers.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels8 records

Core offering

JST Group is a 100+ year Japanese steel infrastructure conglomerate that designs, fabricates, and erects hollow steel tube transmission towers for electric power utilities, designs and constructs major steel bridges for government infrastructure clients, and manufactures precision bolts and fasteners (NT-DEC® high-corrosion-resistance bolts, N-Petal® anti-loosening bolts). Through JST Co., Ltd., the group also develops and manages real estate (high-rise office buildings, shopping centers, rental condominiums), operates parking facilities, and runs mega solar power generation operations.

Differentiator

Problem solved

Functional benefit

Products and services

• Hollow Steel Tube Transmission Towers World-first hollow steel tube transmission towers for high-voltage (220-500kV+) power transmission lines, with wind force coefficient of 1.6 versus 2.0 for angular steel towers, enabling more economical large-capacity designs. Designed, fabricated, and erected by Nippon Tettō Kōgyō (Japan Steel Tower Industries) for electric power utilities.
• Steel Bridge Design, Fabrication, and Erection Full-service steel bridge construction including cable-stayed, suspension, arch, and truss bridges for government infrastructure agencies. Major projects include Hayatsue River Bridge (5,880 t steel weight), New Aso Bridge, Tokyo Skytree steel assembly, and seismic reinforcement of aging bridges. Includes SJS-H low-noise expansion joint removal method.
• Steel Structure Maintenance and Longevity Services Comprehensive inspection, diagnosis, repair, reinforcement, and long-term maintenance services for steel towers and bridges. The NT-Steel Structure Longevity System includes internal camera inspection, ultrasonic diagnosis, partial zinc repair, and member replacement methods for aging steel infrastructure lifecycle extension.
• NT-DEC® High-Corrosion-Resistance Bolt High-corrosion-resistance bolt with proprietary 4-layer composite coating: hot-dip galvanizing (HDZ35/45) base, special chemical conversion film, and two-layer high-performance anti-corrosion paint coating. Provides significantly enhanced corrosion resistance versus standard hot-dip galvanized bolts. Manufactured by Nihon Tettō Ōmori Kōjō.
• N-Petal® Anti-Loosening Bolt Spring compression-based bolt loosening and shedding prevention device. Verified against 30,000 vibration cycles per NAS3350 specification without nut shedding. Features visual tightening confirmation (eye point), reusable design, easy socket removal. Registered trademark. Manufactured by Nihon Tettō Ōmori Kōjō.
• Hot-Dip Galvanizing Services JIS-certified hot-dip galvanizing processing services for steel components at both Wakamatsu Factory (JIS H 8641 certified) and Omori Factory. Wakamatsu operates robot-based galvanizing with automated product handling, immersion, centrifugal separation, and cooling robots. Accepts outsourced galvanizing contracts from external customers.
• Real Estate Development and Management Development, management, and leasing of high-rise office buildings, large shopping centers, and rental condominiums primarily in the Tokyo metropolitan area and Aichi. Notable projects include participation in Akasaka Intercity AIR (2017 large-scale Tokyo redevelopment) and development of Shinsuna Plaza headquarters.
• Parking Lot Operations (Shinsuna Plaza Parking) Large-scale parking facility operations in Koto-ku, Tokyo, located closest to the Koto Driver Licensing Center. Offers both hourly time-based parking and monthly subscription parking with all flat-paved spaces, indoor covered areas, and round-the-clock attendant security patrols.
• Solar Power Generation (Mega Solar) Large-scale megawatt-class solar power generation operations contributing to clean energy and environmental sustainability. Provides solar panel support structures for PPA solar carport systems, including Japan's first municipal BCP-oriented PPA system at Fabusco Co., Ltd., enabling emergency power at disaster shelters.

Quantifiable outcome

• Hollow steel tube towers with wind force coefficient of 1.6 vs. 2.0 for angular steel towers, enabling more economical large-capacity transmission towers
• +4 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature11 records

Partnerships

Six partnerships are on record, tiered minor and core.

• 福岡県立高校 (Fukuoka Prefecture High Schools)minorStrategic or Co-development Partner · 23 October 2025JST participated in career education programs for Fukuoka Prefecture high school students, accepting 9 students for career guidance interviews. Part of company's SDG activities and community contribution.
• 九州工業大学 (Kyushu Institute of Technology)minorStrategic or Co-development Partner · 16 September 2025JST became a Kyushu Institute of Technology (九工大) member, supporting student projects through donations. The university, located near JST's main production base, has produced many graduates who work at JST. The membership supports student-led regional contribution projects.
• 九州電力送配電株式会社 (Kyushu Electric Power Transmission & Distribution Co., Ltd.) — 3D Model AdoptioncoreTechnology or Integration · 1 January 2024JST's proprietary 3D tower model adopted by Kyushu Electric Power Transmission & Distribution for tower assembly work efficiency improvement. Enables smoother information sharing and work time reduction at construction sites.
• 北九州市 (Kitakyushu City) — SDG RegistrationminorOthers · 1 January 2021Registered as Kitakyushu SDG company, contributing to UN Sustainable Development Goals through business activities. Also partnered for career education programs and road beautification initiatives.
• ファブスコ株式会社 (Fabusco Co., Ltd.)minorOEM/ Whitelabel/ Licensing Partner · 1 January 2018Fabusco operates PPA solar carport systems using solar panel support structures designed and manufactured by JST. Japan's first municipal BCP-oriented PPA system, providing emergency power at disaster shelters.
• 九州電力送配電株式会社 (Kyushu Electric Power Transmission & Distribution Co., Ltd.)coreStrategic or Co-development Partner · 1 January 1965Long-standing strategic partnership since 1965 for joint development of the world's first hollow steel tube tower. Main customer for steel tower supply and maintenance. 2026 CEO-to-President dialogue published highlighting 100+ year relationship. Approximately 6,700 of their steel pipe towers in operation in Kyushu.

Scale indicators11 records

Recent moves6 records

Expansion highlights6 records

Regional players

• Nabtesco Precision Equipment: Japanese precision components and fastener manufacturer with industrial bolt products. Regional player comparable to JST's high-strength/corrosion-resistant bolt products for infrastructure applications in Asia.

Broad incumbents

• Sumitomo Mitsui Construction: Major Japanese general contractor with significant bridge and steel structure construction capabilities. Competes with JST for government bridge and infrastructure contracts but operates as a broader construction group.
• Nippon Steel Engineering: Large Japanese steel structure and engineering contractor with capabilities in bridges, towers, and industrial steel construction. Overlaps with JST's steel bridge and steel tower EPC work but operates at much larger scale with broader energy and infrastructure portfolio.
• Takenaka Corporation: Major Japanese construction company with extensive steel structure and high-rise building portfolio. Overlaps with JST on steel construction methods but is far larger and broader in scope including commercial real estate.
• JFE Engineering: Major Japanese engineering and construction company within JFE Group with steel structure, transmission tower, and energy infrastructure capabilities. Broad incumbent in the same steel infrastructure space as JST but with much larger portfolio and group backing.
• Kobelco (Kobe Steel) — Steel Structures Division: Kobe Steel's steel structure and tower manufacturing arm competes in the Japanese steel tower and bridge market. Larger incumbent with broader steel product portfolio and global reach, overlapping with JST in transmission and structural steel.
• Shimizu Corporation: One of Japan's largest general contractors with extensive steel structure, bridge, and infrastructure capabilities. Competes with JST on government bridge contracts and seismic reinforcement projects but at much larger scale and broader scope.

Direct peers

• Yokogawa Bridge Holdings: Leading Japanese steel bridge manufacturer and erector with comparable bridge design/fabrication/erection capabilities. Direct overlap with JST's bridge business and serves similar government and rail infrastructure customers in Japan.

Others

• DAIDO STEEL: Japanese specialty steelmaker producing high-strength bolts, structural steel, and fasteners. Comparable to JST's Omori Factory precision bolt business as an upstream steel and fastener supplier.
• Hitachi Metals (now Proterial): Japanese specialty steel and materials manufacturer including fasteners and electrical components. Comparable to JST's bolt/nut manufacturing business at Omori Factory as a supplier in the same fastener ecosystem.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks1 record

Key highlights7 records

Customer concentration

• Xx.com/JST_recruit

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries4 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 JST