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Latest update: 30/05/2017 17:59:58

Tohoku bolt MFG. Co., Ltd.

Contributing to social infrastructure in and out of Japan with hot forged bolts

A hot forged bolts manufacturer established in 1943, we supply a wide range of products mainly to industries such as railroads, industrial machinery, civil engineering and construction. We excel at producing high-quality large-diameter bolts having diameters of 30 mm or more, which are considered difficult to manufacture, and are expanding our business. We also conduct R&D and have received patents for original products jointly with client companies, universities and other partners. Our products are used in the Hokkaido, Tohoku and Hokuriku Bullet Train Lines, Center Loop Shinagawa Line of the Metropolitan Expressway, Hachinohe Thermal Power Plant, Shin-Sendai Thermal Power Plant, Joban Nakoso Power Plant, Fukushima Offshore Floating Wind Farm and the like. Overseas, our products are used in the Taiwan Bullet Train Lines and Beijing Subway, thus contributing to social infrastructure in and out of Japan.

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Other presentation

[Company strength]
As a manufacturer of hot forged and heat treated bolts, we have an integrated manufacturing and quality assurance system using in-house facilities. We also conduct failure analyses of market products and research & development of new products, in addition to technology cultivated since our company’s establishment, and have constructed a system for meeting the needs for fastening in various fields. In particular, we can produce large-diameter bolts which are difficult to manufacture.

[Business description]
Our company was established as a bolt factory of a coal-mining equipment manufacturers’ union for supplying materials to Joban coalfield. We make full use of hot forging and heat treatment technologies, thereby manufacturing and selling metal fastening parts with high quality at reasonable prices. We supply bolts to various industries including railroads, civil engineering, construction, industrial machinery and the like, and are highly evaluated. We also conduct R&D and have received patents, etc. for original products jointly with client companies, universities and other partners. We are helping to improve the social infrastructure by supplying safe and low-cost fastening parts.

[Industry]
Manufacturing and sales of metal fastening parts

[Strength of products/technologies]
We have an integrated manufacturing and quality assurance system, to ensure traceability of manufacturing and quality. In addition, we use fractography for quality assurance, and have constructed a system for quickly responding to emergency failures and material defects. Our R&D department conducts research and development on “fastening”, and works with client companies and universities to research and develop original products and acquire patents, etc. We acquired technology for precisely controlling the crystalline structure of metal through “micro processing control technology of large-diameter bolt” developed in the “Strategic Core Technology Advancement Program in 2012-2015”.

[Representative's message]
We are committed to being a fastening products manufacturer trusted by customers. We manufacture and sell safe, low-cost fastening products (bolts, screws, etc.) to customers involved in social infrastructure construction such as railroads, architecture, civil engineering and construction. We established a “Screw Laboratory” as a new research & development department, and a corporate planning department, in order to increase these values which customers require. We will continue contributing to society while enhancing the skills of individual employees and corresponding to customer needs. We would appreciate your ongoing support.

[Company structure for market development/overseas expansion]
We deal with customers throughout Japan via our Tokyo Office for manufacturing and products. A department within the Tokyo Office focuses on overseas business and employs foreign staff.

[Market share/Ranking]
Our company is placed 7th by sales value as a hot forged bolts manufacturer. We excel at large-diameter bolts having diameters of 30 mm or more, and are one of Japan’s leading companies in this field.

[Awards and media coverage]
[Awards]
300 of Japan's Vibrant Monozukuri (Manufacturing) SMEs (2014)

[Media]
Fukushima-Minpo (February 11, 2015), Fukushima Minyu (February 12, 2015) and Fastening Journal (April 17, 2015)


[Authorization/Certification]
ISO 9001:2008
JIS B1180 hexagon bolt, JIS E1107 seam plate bolt and nut, JIS E1108 railroad spike, JIS E1109 rail screw



[Joint research and development]
JP 2013-174067, JP 2009-019347, JP 2008-025335, JP 2006-002405 and JP 2004-162256

[Main Clients / Business History (domestic)]
East Japan Railway Company (Tohoku Bullet Train) in 2011; East Japan Railway Company and West Japan Railway Company (Hokuriku Bullet Train) in 2010-2014; Hokkaido Railway Company (Hokkaido Bullet Train) in 2014; Center Loop Shinagawa Line of Metropolitan Expressway in 2010-2014; Shin-Sendai Thermal Power Plant in 2013; Fukushima Offshore Floating Wind Farm in 2012; Hachinohe Thermal Power Plant in 2013; Joban Nakoso Power Plant in 2014; and emergency storage warehouses for Tokyo Gas Co., Ltd. and Nippon Chutetsukan K.K. in 2011-2014

[Main Clients / Business History (overseas)]
Taiwan Railway Administration Bureau (Taiwan Bullet Train) in 2004; Beijing Mass Transit Railway Operation Co., Ltd. (Beijing Subway) in 2006; Cominter Equipment in 2015

This company is recommended by the following support organizations.

Tohoku Head Office, SMRJ
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