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Latest update: 06/12/2016 14:39:50

Mikuro Spring Co., Ltd.

We have a good track record of performance in manufacturing coils for semiconductors and the medical treatment field.

We manufacture springs using the NC spring processor which we developed independently. We have overseas bases in Kuala Lumpur, Shanghai, and Dalian. Our company possesses about 700 sets of spring processors in total, which enhances our mass production system. We have the capability to realize the mass production of superfine springs that are thinner than a hair. Another of our strengths is our manufacturing technology for coils for semiconductor test equipment and medical equipment, which makes use of our processing technology for super-thin compression springs.

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Other presentation

[Company strength]
Our original NC machine does not use any special tools or cams at all. We have used it to realize 24-hour unattended operation. We have expanded our overseas business (except for some products). We are planning to expand globally based on our three major bases, in Malaysia, Shanghai and Dalian.

[Business description]
We have been processing and selling mainly small precision springs since our foundation on June 1, 1954. We manufacture springs by making use of the NC spring processor we developed independently. Our company owns about 700 sets of spring processors worldwide. We have established overseas bases in Kuala Lumpur, Shanghai and Dalian. We maintain mass production systems in locations that are closer to our customers.

Metal processing and spring processing manufacturing

[Strength of products/technologies]
We have realized the mass production of superfine springs that are thinner than a hair. This was done to take on the challenge of small articles. We have strengthened our coiling technology in areas from semiconductor test equipment to medical treatment. This has been done by making use of our technology to process superfine compression springs with an outer diameter of 72 mm. We have also realized mass-production forming processing from a wire diameter of 80 mm.

[Representative's message]
Our goal is to be a unique enterprise that continues the global transmission of ultra-fine Monozukuri craftsmanship that can only be done in Japan. 

[Company structure for market development/overseas expansion]
We are advancing our in-house R&D activities with a focus on superfine springs, coils for medical treatment, and the automobile field. We conduct behavior simulation before processing springs, and make our own proposal when our customers start their investigation of new parts production. We have also organized a joint project with a core wire manufacturer regarding the handling of new materials. 

[Market share/Ranking]
Tip springs for ballpoint pens: 70% share of domestic Japanese market.

[Awards and media coverage]
300 of Japan's Vibrant Monozukuri (Manufacturing) SMEs selection by the Ministry of Economy, Trade and Industry.

Nikkei Business: “A small top-runner;” NHK: appeared on Quiz Cuesta.

Acquired ISO 9001and ISO 14001 certification.

[Joint research and development]
School of Medicine, Shinshu University.

This company is recommended by the following support organizations.

Kanto Head Office, SMRJ

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