SANKOSHA operates in a wide range of fields that underpin essential social infrastructure,including railway signalling systems, equipment for railway rolling stock,traffic signals, roadsignage, and gas alarm systems.
To support safety and smooth mobility inevery day life, we are committed to delivering high levels of quality and reliability, managing the entire process from technology development through manufacturing in an integrated manner.
As a company dedicated to protecting what people take for granted every day, we continue to provide peace of mind and reliable value to communities around the world.

Railway signals

Our core products include a wide range of ATS wayside components for safe train operation,color-light signalling systems, point machines and related accessories required for turnout switching, as well as level crossing safety equipment that helps ensure safety at level crossings.
Through these products, we contribute to maintaining the safety of railways, the primary mode of land transportation.

Railway rolling stock

Our core products are automatic brake clearance adjusters designed to maintain optimal braking force in railway braking systems.
These products support the safe operation of railway rolling stock—including diesel multiple units and freight cars operating across Japan—by ensuring consistent and reliable braking performance.

Traffic signals

To ensure the safety at road junctions while maintaining smooth traffic flow, we adopt advanced control technologies and deliver systems optimized for specific days of the week, times of day, and locations. Through these efforts, we contribute to enhanced traffic safety and improved efficiency.
In response to increasingly complex traffic environments,we are committed to the continuous development of safer and more efficient equipment and systems, working tirelessly to support a more secure and sustainable transportation society.

Road signage

Internally illuminated guide signs, introduced in 1968 alongside the opening of the Tomei Expressway, continue to serve as vital wayfinding infrastructure across approximately 9,000kilometers of expressways throughout Japan—from Hokkaido to Okinawa.
By delivering essential information to drivers, these signs play a critical role in supporting safe and reliable travel on Japan’s highway network.

Gas

In response to the strengthened safety standards introduced by the 1981 revisions to Japan’s Fire Service Act and Gas Business Act, we have enhanced our systems for centralized monitoring and integrated control of gas leaks, while also developing new products.
These solutions address a wide range of needs, including buildings, hospitals, hotels, large public facilities, and shared utility tunnels for pressure-fed gas pipelines, contributing to improved safety across society.

SANKOSHA’s manufacturing excellence is built on the integration of proven production capabilities cultivated at our Kofu Operations and Kofu Techno Center in Yamanashi Prefecture, together with advanced technology development carried out at both our Head Office in Tokyo and the Kofu site.
We ensure the high standards of quality required for social infrastructure products—such as those for railways, traffic systems, and gas applications—through rigorous quality management and comprehensive environmental testing, while continuously evolving by actively incorporating new technologies and materials.
With a comprehensive manufacturing framework that balances quality, delivery, and cost, we create products that support safety and provide lasting peace of mind.

Quality
Uninterrupted quality, backed by rigorous verification and management

SANKOSHA maintains comprehensive environmental testing facilities—including waterproofing and water spray tests, as well as temperature and vibration testing—and implements rigorous quality control measures such as 100% inspection of LED luminance.
We also continuously improve jigs and review production processes to ensure a high level of reliability capable of withstanding demanding on-site conditions.

Technology
Head Office × Kofu site: Where our new technologies and innovations are born

Centered around our Head Office and Kofu site, SANKOSHA’s Engineering Division drives more than 150 new and upgrade projects each year.
Our activities span a wide range of initiatives, from the introduction of new materials, light sources, and advanced processing methods to research on monitoring systems utilizing AI and wireless communication technologies.
With a development approach that places usability at its core, we have been recognized with the Good Design Award in 2015 and 2018, enabling continuous product evolution and the creation of new value.

On-site capabilities
Kofu site's integrated production system: Enabling high-variety, high-reliability manufacturing

At our Kofu Operations and Techno Center, we manufacture a diverse range of social infrastructure products, including traffic signals, signs, omnidirectional level crossing warning lights, and gas detectors.
We manage the entire production process in-house—from machining and assembly to inspection and shipment. Although our railway-related products encompass hundreds of variants, each designed for specific applications, we achieve consistently high quality through the flexibility to accommodate a wide product mix,supported by the skilled craftsmanship of our on-site teams.

Behind the scenes, we support the everyday essentials that people depend on.
By connecting the manufacturing strength of our Kofu site with the advanced engineering expertise of our Head Office, SANKOSHA helps build the foundations of daily life—from railways and roads to gas infrastructure and beyond.
Through continuous refinement of quality and an ongoing commitment to new technologies,
these steady efforts support peace of mind today and help shape a safer future for generations to come.

Outline

Company name SANKOSHA Co., Ltd.
Founded July 1, 1926
Capitalization 450 million yen
Representative President and CEO: Takashi Kato
Number of employees 250
Location 2-37-6 Hatagaya, Shibuya-ku, Tokyo 151-0072, Japan
Major customers JR companies, public and private railways, prefectural police departments,expressway companies, city gas companies

Business Location

Head Office

2-37-6 Hatagaya, Shibuya-ku, Tokyo 151-0072, Japan

Kofu Operations

1262-7 Otsu-machi, Kofu-shi, Yamanashi 400-0055, Japan

TEL+81-55-243-5051 (main)

FAX+81-55-243-4611

Kofu TechnoCenter

107-2 Otoguro, Chuo-shi, Yamanashi 409-3812, Japan

Other business locations

Hokkaido & Tohoku area Sapporo/Akita/Morioka/Sendai
Kanto & Koshin'etsu area Niigata/Takasaki/Saitama/Chiba/Nagano
Chubu & Tokai Area Nagoya/Shizuoka
Kansai & Western Japan area Osaka/Kyushu

Inquiries Regarding Railway Signaling

  • TEL.+81-3-3377-4132
  • FAX.+81-3-3376-3928

Infrastructure Solutions

  • TEL.+81-3-3377-4133
  • FAX.+81-3-3376-3928

Other Inquiries

  • TEL.+81-3-3377-4131
  • FAX.+81-3-3377-2000