Introduction to Businesses and Products

The Lives and Future
That We Support

Through its steel, heavy industry, and trackwork materials businesses, the Yamato Kogyo Group supports social infrastructure that is essential for people’s lives.
Through our contributions to infrastructure not only in Japan but in a variety of other countries and regions, we make a significant contribution to developing the future of the planet.


Our steel business consists of two departments: "steel making" and "rolling".
In the steel making department, semi-finished products are made using a large electric arc furnace and continuous casting machine. Then, in the rolling department, the semi-finished products are processed and formed into various types of products by machinery such as a reheating furnace and rolling mill.

List of Yamato Steel Co., Ltd. steel products

Heavy Industry

The Heavy Industry businesses is focused on the stern frames that support the rudder and propellers on the sterns of ships. As a stern frame manufacturer, it has one of the highest market shares in Japan.
A major strength is that it has an integrated production line that can manufacture everything from large castings, to machined parts, to large structural steel components.

List of Yamato Steel Co., Ltd.
heavy industry products


The trackwork materials business makes wide-ranging contributions to the safety of railways through its turnouts, anti-derailing/deviation guards and other products.
This is the business on which Yamato Kogyo was founded, and the technology and experience that we have accumulated over the course of more than half a century are highly rated and trusted by customers both in Japan and overseas.

Manufacturing locations

Yamato Kogyo is a global company that has expanded its business all over the world from Himeji City, Hyogo prefecture.
The employees of the Group are working together as one to provide comprehensive local support for the local manufacture and sale of steel products, and to provide manufacturing that supports social infrastructure around the world.

List of Group companies

Products at Overseas Locations

  • Jumbo H-Beams

    Jumbo H-beams are heavy wide-flange structural shapes with a weight per foot up to 808 pounds and a flange thickness exceeding 5-inches.. These heavy shapes are used in columns and trusses in high-rise building construction, stadiums, and other applications

  • Sheet Z-Piles

    Z-shaped sheet piles are called Zs because the single piles are shaped roughly like a horizontally stretched Z. Steel sheet piles are long structural sections with a vertical interlocking system that create a continuous wall. The walls are often used to retain either soil or water. The ability of a sheet pile section to perform is dependent upon its geometry and the soils it is driven into. The pile transfers pressure from the high side of the wall to the soil in front of the wall. Z piles can be used in a wide variety of applications such as retaining walls, cofferdams, parking garages, environmental barrier walls and steel bulkhead walls

  • Rebars

    Reinforcing bar is defined as bar steel which is used to reinforce concrete on Korean Standards.
    It is widely used at building construction and civil engineering sites now that it has the advantages of serving as key building materials for a bridge, building, nuclear power plant etc. Today, plus reducing the width of concrete cracks when they occur.
    Reinforcing bar is manufactured by hot rolling, and divided into steel round and steel deformed according to the cross-section type, YKS produces steel deformed.

  • Angle Steels

    Angles are used for making transmission towers required for power and communication applications. Angles are a crucial component in ensuring a safe and reliable structure for the towers.
    Towers transmit power, communication and radio waves, which is an essential component to any aspiring community. The efficiency and accuracy of towers is greatly improved with the production and use of angles.

※Yamato Steel does not handle these products.