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Latest update: 27/04/2017 14:10:31

Sigma Seisakusho Co., Ltd.

Construction equipment castings and cast components for hydraulic equipment.

Our company mainly manufactures castings for construction equipment and cast components for hydraulic equipment. Since our establishment, we have been praised for our FC and FCD castings. With a system that can handle a wide range of small-lot production runs, we provide highly reliable products to many different industries with support for quick turnaround. We have always been proactive in opening factories and adopting state-of-the-art production equipment. Our company also promotes ecologically friendly casting, from the viewpoint that environmental issues are among our most pressing problems. Based on our ISO 9001-certified quality management system, we have eliminated the use of toxic substances in production processes and are working to reduce our resource and energy consumption.

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Other presentation

[Company strength]
Since our establishment, we have strived to manufacture products that satisfy customers under the motto “Quality is No. 1.” Moreover, we have always been proactive in opening factories and adopting state-of-the-art production equipment. Our company also promotes ecologically friendly casting, from the viewpoint that environmental issues are among our most pressing business problems. We obtained Ecostage certification in 2010 and ISO 9001 certification in 2012. Based on our ISO 9001-certified quality management system, we have promoted eco-friendly company activities, such as prohibiting the use of toxic substances in our production processes and working to reduce our resource and energy consumption.

[Business description]
Our company mainly manufactures castings for construction equipment and cast components for hydraulic equipment. Since our establishment in 1952, our FC and FCD castings have continued to receive high praise. With a system that can handle a wide range of small-lot production runs, we provide highly reliable products to many different industries with support for quick turnaround.

[Industry]
Cast components for construction equipment and hydraulic equipment

[Strength of products/technologies]
Our company measures the hardness of every casting product lot and runs two-channel emission spectrometry analyses on molten metal for real-time comparisons between manufacturing outputs and analysis results. We maintain a production management system supporting the delivery of some 3,000 parts from small lots to volume production (1 to 5,000 pieces). We produce products that range from 1 to 30 kilograms in weight.

[Representative's message]
Casting is a process that has been handed down since antiquity. It is indispensable to people’s lives and has sustained our economy as the cornerstone of industrial growth. In recent years, there has been an increasing focus on environmental issues, so we constructed the Hanaizumi Plant in Iwate Prefecture in 2004, moving from Kawaguchi, Saitama Prefecture, to address casting factory environmental issues and to pursue new growth and technological advances. This is Japan’s youngest and most vibrant casting factory. With today’s massive globalization trend and transformation, we plan to continue growing alongside our customers by accurately gauging the needs of existing customers and new customers alike.

[Company structure for market development/overseas expansion]
Customer service is provided by the five members of our sales department who are skilled in technical sales and addressing customer requests. When necessary, the four members of our technology department can also field customer inquiries.



[Market share/Ranking]
Not known, as market shares are not measured

[Awards and media coverage]
[Awards]

[Media]

[Authorization/Certification]
ISO 9001 / Ecostage 2



[Joint research and development]
Selected R&D projects
Patent Application No. 216418 for a method of manufacturing oil-less bearings and a casting mold for manufacturing oil-less bearings
Patent Application No. 218982 for a method of manufacturing a holder guide bushing
Utility Model Registration No. 3184414 for a contaminant strainer for castings



[Main Clients / Business History (domestic)]
Direct transactions: Komatsu Ltd. and Komatsu Group companies, Tokyo Keiki, JFE, ShinMaywa Industries, Bunka Shutter, Hitachi Chemical, Hitachi Cable, Maruyama Manufacturing, Miyako Hydraulic Brake Manufacturing, TBK, Tokyo Seiko, Ogura Clutch, Soushin, Saitama Kiki, Tsubaki Yamakyu Chain, MeidenshaIndirect transactions: Fanuc

[Main Clients / Business History (overseas)]
TRW

This company is recommended by the following support organizations.

川口信用金庫
Kanto Head Office, SMRJ
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