Sasaki-Hatsujo Co., Ltd.

Since our establishment in 1940, we have, without interruption, worked with springs, creating everything from small lots of hand-crafted items to mass production machined springs. With cutting-edge facilities and knowhow to meet the continuously arising prototyping needs, we currently create a wide variety of products in several sizes, including for oil filters used in heavy machinery, cargo loading and unloading equipment, hydraulic equipment, automobiles, railway vehicles, and electronic equipment.

Compression　Springs

Tension Springs

Torsion Springs

Special Shaped Springs/Formed Parts

Leaf Springs

Specialized Products, Technologies and Services

Compression springs Tension springs

Compression springs

Wire diameter: 0.1 mm to 16 mm
Extended length: 3,000 mm or more
D/d: 3 or less


Tension springs

Wire diameter: 0.1 mm to 16 mm
Extended length: 3,000 mm or more
D/d: 3 or less
Special shaped hook: We can also fabricate special shaped hooks.

Torsion springs Special shaped springs/formed parts

Torsion springs

Wire diameter: 0.1 mm to 10 mm
Angle of twist: 180 degrees or more


Special shaped springs/formed parts

We listen to your requirements and design and manufacture springs that meet customer
needs. We can meet the need for springs of any shape.

Leaf springs

Leaf springs

Thickness: 0.1 mm to 2.0 mm
Materials: Steel (bainite steel, ribbon steel, SUP, SK, etc.), stainless steel, and copper
(phosphor bronze, beryllium, etc.)

Current Status of Overseas Business

Key Business Partners

Future Target Countries and Regions

Asia,EU,USA

Overseas Business Prospects

Company Information

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