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  3. 合同製鐡株式会社
Building materials, supplies and fixtures manufacturers
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合同製鐡株式会社

EstablishmentDecember 9, 1937 (Showa 12)
capital34896000Ten thousand
number of employees725
addressTokyo/Chiyoda-ku/9th Floor, Marunouchi Central Building, 1-9 Marunouchi, Tokyo
phone03-5218-7093
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last updated:Apr 18, 2025
合同製鐡株式会社logo
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  • Products/Services(11)
  • catalog(14)
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合同製鐡株式会社 Company Profile

"Iron" New Century Joint Steel Manufacturing Co., Ltd.

Our company has contributed to society through the provision of steel products that support infrastructure, based on the steelmaking technology we have cultivated for over half a century since 1937. This includes reinforcing bars that support reinforced concrete structures, which are a major construction method in civil engineering, as well as wire rods and shapes used in various urban infrastructures, and structural bars that serve as key components in industrial machinery. During this time, we have consistently worked on advancements in production and product technology, responding to societal and customer demands by developing mechanical coupling methods for reinforcing bars that improve productivity in construction, high-strength steel, and providing steel materials that enhance workability and reduce processes for our customers. While steel production is expanding globally, in our country, which is a steel advanced nation, the generation of steel scrap, which consists of steel products that have already reached the end of their useful life, is quantitatively sufficient to support steel production in the civil engineering sector, which is the core of domestic infrastructure development. The role our company plays in the "reutilization" of iron resources, utilizing domestic resources like steel scrap with minimal energy to contribute to the formation of social capital, is becoming increasingly important. The harmony of people, technology, and the natural environment is essential, and the Joint Steel Group will steadily advance in pursuing the unknown realms and possibilities of iron.

Business Activities

■Manufacturing and sales of steel sheets, wire rods, various large and medium-sized steel shapes, rails, structural bars, and rebar.

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Products/Services (11)

Fittings and Threaded Reinforcement Bars" Kanto Deva Steel Co., Ltd. "Comprehensive Catalog product image
Fittings and Threaded Reinforcement Bars" Kanto Deva Steel Co., Ltd. "Comprehensive Catalog
Whether it's bamboo joints or screw joints! We propose the best construction methods for rebar work that meet your needs. product image
Whether it's bamboo joints or screw joints! We propose the best construction methods for rebar work that meet your needs.
Coupling "EG Joint/EG Butt Joint" product image
Coupling "EG Joint/EG Butt Joint"
Mechanical Rebar Coupler 【EG Joint (Standard Type)】 product image
Mechanical Rebar Coupler 【EG Joint (Standard Type)】

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catalog(14)

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Comprehensive Catalog [Kanto Day-Bars Steel Co., Ltd.]

Comprehensive Catalog [Kanto Day-Bars Steel Co., Ltd.]

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Coupling "EG Joint / EG Butt Joint"

Coupling "EG Joint / EG Butt Joint"

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Construction Method 【EG Joint (Joint Type)】

Construction Method 【EG Joint (Joint Type)】

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Construction Method 【EG Joint (Standard Type)】

Construction Method 【EG Joint (Standard Type)】

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news(1)

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The merger has resulted in the establishment of "Kanto Deva Steel Corporation" from the joint venture of Daido Steel Co., Ltd.

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Kanto Deva Steel Corporation was formed in 2019 through the merger of Hōdō Seitetu Co., Ltd. and Asahi Kōgyō Co., Ltd.

Jul 06, 2020

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Detailed information

Company name 合同製鐡株式会社
number of employees725
Contact addresspostalcode 100-0005 Tokyo/ Chiyoda-ku/ 9th Floor, Marunouchi Central Building, 1-9 Marunouchi, TokyoView on map TEL:03-5218-7093 FAX:03-5218-7085
Industry Building materials, supplies and fixtures manufacturers
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