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Latest update: 30/05/2017 18:02:20

Tokai Spring Seiskusho Co., Ltd.

We apply the technology we have been accumulating for many years to manufacture various automotive springs.

Our company manufactures leaf, wire, and other types of springs mainly for automobiles, and also for home electronics appliances, communications equipment, and gas equipment. We manufacture wire products by plate and wire forming and pressed products by metal press working, as well as module products, including resin products. We are proactive about design-in joint development with customers. Our company has established a system for participating in product development from an early stage and making proposals. We manufacture precision molds and compact life cycle assessment (LCA) systems based on the technology we have been accumulating for many years and our unique ideas (33 patents). Our company is highly appreciated for high quality, low cost, and short-term deliveries because of our integrated production system.

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[Company strength]
Our company is proactive about design-in joint development with customers. We participate in development, design, and trial manufacturing to make proposals starting from short-term development. We have an integrated production system from mold design and production to press forming, product machining with automated equipment, thermal treatment, and packaging. Our company is highly appreciated for high quality, and also for low cost and short-term deliveries.



[Business description]
Our company manufactures leaf, wire, and other types of springs mainly for automobiles, and also for home electronics appliances, communications equipment, and gas equipment. We manufacture wire products by plate and wire forming and pressed products by metal press working, as well as module products, including resin products.

[Industry]
Metal spring manufacturing; press working

[Strength of products/technologies]
We conduct our own design and manufacturing of precision molds and compact life cycle assessment (LCA) systems. This is based on the technology we have been accumulating for many years and our unique ideas (33 patents). Our products include leaf springs, wire springs, and modules produced in an integrated production system. We mass-produce leaf springs by pressing iron, stainless steel, copper, brass, and phosphor bronze sheets as thin as 0.1 to 4.0 mm at high speed. We mainly process piano wire and stainless steel wire from 0.1 to 4.0 in diameter into wire springs with various shapes according to their purpose of use. We manufacture modules from multiple parts, such as springs, resin parts, and pressed parts, using processing methods such as spot welding, rivet caulking, and press fitting.

[Representative's message]
Our company has been providing Japanese industry with springs for important functions since our foundation, including to the core automotive industry. The design and engineering staff and field production staff are close to each other at our company. They improve and devise drawings, products, and on-site production equipment with each other. We have been devoted to establishing a corporate culture where the staff mutually improve themselves, and also to training human resources. We will maintain our contribution to the sustainable growth of society and our customers. We will do this by training human resources for Monozukuri craftsmanship with importance placed on passing down “know why” as well as know-how. We will make our staff and their families happy through our company management.



[Company structure for market development/overseas expansion]
Our sales division serves customers. We have a long track record of technical consulting involving the technical division and also technical staff in the sales division. We have a system capable of understanding and appropriately responding to customer requests after a short meeting and making technical proposals at an early stage.



[Market share/Ranking]
We have a 20% share of the Japanese market for automotive wiper springs.

[Awards and media coverage]
[Awards] 
Nihon Denso (now DENSO Corporation), Quality Management Award (November 1987).

[Media]
Information program, "Ryu's Talking Live" (June 2014).


[Authorization/Certification]
ISO 9001 and ISO 14001.

[Joint research and development]
We have participated in many development projects, including the following.
Nifco Inc.: Joint development of a mesh product for oil filter caulking (Japanese patent pending).
Nagase & Co., Ltd.: Joint development of a TP (twisted plate) retainer for securing resin flow space.
TOYODA GOSEI Co., Ltd.: Joint establishment of a hinge opening and closing mechanism.


[Main Clients / Business History (domestic)]
DENSO Corporation (springs for automotive electric equipment), TOYODA GOSEI Co., Ltd. (springs for automotive interiors and exteriors), Mitsubishi Motors Corporation (springs for automotive powertrains), Nagase & Co., Ltd. (resin filters), Nifco Inc. (automotive oil filters), Toyota Industries Corporation (springs for automotive compressors), Rinnai Corporation (gas range parts), Makita Corporation (constant force springs for electric tools), and so on.

[Main Clients / Business History (overseas)]
We have a proven track record of direct and indirect deliveries to overseas companies through our customers in Japan and our overseas sites.

This company is recommended by the following support organizations.

Chubu Head Office, SMRJ
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