Comprehensive surface
modification experts

About Us


Since our founding in 1963, we have been engaged in manufacturing and selling of special welding materials specialized in “build up welding” that gives specific properties like anti abrasion or anti corrosion to dies molds and equipments, as well as we have been providing special welding work using our special welding materials.

Our strength is the history of developing original suitable alloys to customers’ requirements, thus we can offer welding materials efficiently to customers’ demands.

We have highly strict quality control standards to deliver quality reliable products to our customers.

Another strength of ours is 2 types of surface modification treatment works as welding and thermal spraying that allow us to provide various properties of surface modification treatment.

We have and will keep contributing to the local community as a “Toyota SDGs partner” sponsored by Toyota city where we have a base in. In the future, we aim to become a total surface modification treatment provider by widening the range of surface treatment to deliver more satisfying services to our customers.

Special technology


Pioneer of build up welding

What is build up welding?

Build up welding is a technique to build up deposit layers onto a base material while general welding is used to joint different materials.
It is possible to regenerate corroded or worn industrial parts, and to improve durability by adding anti abrasion or anti corrosion properties.
Metallurgically bonded layers of build up welding, which is thicker than a layers of thermal spraying or plating, give highly durable surface treatment effect.

Our products are mainly applied to

Pressing (stamping) dies for automobile body parts.
Die casting molds for automobile engine parts.
Forging dies for automobile suspension parts.
Base molds of dies cast machines.
Transfer jigs for sintering process.
Scratch repair for cast products like water pipes.

Our article ad was published in the economic newspaper “Wedge”.




Welding Materials
Development and Manufacturing Division

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Special Welding Construction Division

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Thermal Spraying Construction Division

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Pioneer manufacturer of special welding materials
Always leading the industry with its technology

Combining innovative technology and evolution, we provide advanced solutions that surprise the world.

Innovation, evolution, challenge.

Experience the world view of the future that Tokai Yogyo will lead.

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If you would like to request an SDS (Safety Data Sheet), please contact us through the Product Inquiry.



Contributing to the longevity of society
through the provision of
surface modification technology


Quality &
Environmental Policy

  • We will comply with laws, regulations, and internal rules, and and continuous improvement of our quality and environmental management system.
  • We will improve customer confidence by accurately grasping customer needs and We will continue to provide products and services that satisfy our customers and enhance their trust in our company.
  • We set, implement, maintain, and review as necessary to improve our business processes, recognizing our situation, the needs of our stakeholders, and our impact on the environment.
  • We strive to protect the environment through pollution prevention and environmental load reduction activities.