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Latest update: 21/04/2021 11:44:52


Specialists in large iron product processing that are capable of everything up to and including machine processing.

Yamaguchi Seisakusho Co., Ltd. can accommodate everything from material procurement, cutting, bending, welding, and machine processing to surface treatment as an integrated service.  We are particularly adept at producing large lighting poles, large sheet metal parts and large metal plate parts that require bending of thick plates. 

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Sales Pitch

Features/Main products/Technology/Message from the representative
We offer an integrated process that includes everything from material procurement, cutting, bending, welding, and machine processing to surface treatment, particularly for large sheet-metal parts and large metal plate parts. 

[Our strengths]
Manufacturing of large lighting poles, large sheet-metal parts and large metal plate parts
  We produce many large sheet-metal products such as extra-large stands, special vehicles and various steel structures.  We invest in facilities for large-scale processing and technical capabilities, and we are confident about our expertise and capabilities. 
Bending of thick plates and thick objects
  We are absolutely confident about our abilities in thick plate bending using 300t benders, and in bending for the design and improvement of dies and molds, which is essential for metalworking. 
Integrated production through partner factories
  While we handle large sheet-metal and metal plates in-house, we also work hard to conduct integrated production and deliver finished products in cooperation with our external partner factories.  We can accommodate a diverse range of requirements, including processing of attachment parts used to connect machine processed parts and sheet-metal parts, or delivery after coating/plating. 

Please make an inquiry to us for the processing of large sheet-metal products that other companies cannot handle. 
[Main products and technologies]
[Main products and technologies]
Large lighting poles
  We can accommodate the manufacture of large lighting poles, including orders for a small number of poles. 
Bending of large and thick plates
  Fields: Parts for special vehicles, industrial machine parts, parts for electricity generation, machine tool parts, parts for various facilities, jigs and tools *We can accommodate orders for small lots. 
  Materials: Iron, stainless steel, zinc-plated steel plate, cast iron, cast steel
Message from the representative
We have been based in our hometown of Kanuma and have been working on processing various products, particularly special automotive parts, since our founding in 1946 We have been working hard to improve the quality of our products through prior investments and company efforts until today. We still believe that our mission is to maintain consistent technological standards to ensure quality without any compromise while delivering appropriately priced products on time. 

This company is recommended by the following support organizations.

Kanto Head Office, SMRJ