超精密切削

Japan Quality

Ultra-Precision Cutting Aspherical and complex parts with 1-micron accuracy.

Yamato Seiki Co., Ltd.

About Us

Yamato Seiki Co., Ltd., based in Chikusei City, Ibaraki Prefecture, has been dedicated to manufacturing as a specialist in ultra-precision machining.
By leveraging advanced metal processing technologies and a well-equipped facility, we provide highly precise products for industrial machinery, robotics, optics, and hydraulic components.

Do you have any troubles like these?

✓ Looking for high-quality parts but struggling to balance cost and performance.
✓ Searching for a partner with reliable precision machining technologies.
✓ Needing a supplier who can ensure stable, long-term delivery.

Let us handle it!

Our Strength

Our greatest strengths lie in our ultra-precision cutting technology, which pursues micron-level accuracy, and our flexible one-stop service capability.

We achieve a surface roughness of less than 1 micron, enabling us to handle highly detailed and precise parts such as molds and lenses.

We are ISO 9001 and ISO 14001 certified, and operate under a strict quality management system.

Through a network of over 50 specialized partner factories, we can provide integrated support from material procurement to machining, surface treatment, and assembly.

We are committed not only to meeting specifications but also to delivering added value that exceeds expectations.

Key Technology

Aspherical Machining of Optical Components

We possess the technology to manufacture parts for precision machinery with even higher accuracy than required.
In particular, we have earned strong trust from major domestic and international manufacturers for our ability to deliver high-precision, cost-effective aspherical parts and complex-shaped metal components.

Promotion Video

Service

◾️High-precision metal machining

Main Products

Core Technologies

◾️ Machining of machine tool components
◾️ Machining of robot components
◾️ Machining of general industrial machinery and equipment parts
◾️ Machining of optical components (aspherical processing)
◾️ Machining of hydraulic components

Message

At Yamato Seiki, we combine know-how in handling a wide range of metals with quick responsiveness to flexibly meet the needs of overseas customers.
We are committed to manufacturing with a philosophy of high quality, short delivery times, and attentive service.
If you are seeking a supplier of high-precision and high-quality components, we invite you to consult with us.
With one-stop solutions and strong proposal capabilities, we aim to be your trusted business partner.

PIC：Takashi Hagiwara, President & CEO
Phone：+81-296-25-3488

Company

Yamato Seiki Co., Ltd.

[Tsukuba Factory] 2101 Kagesawa, Chikusei City, Ibaraki 308-0837, Japan
[Head Officce] 2115 Tamado, Chikusei City, Ibaraki Prefecture, 308-0847, Japan

Phone +81-296-25-3488

Representative	Takashi Hagiwara, President & CEO
Date of Establishment	April 1984
Number of Employees	42 (as of July 2025)
Capital	10 million yen
Revenues	800 million yen
Certifications	ISO 9001, ISO 14001

Corporate Website

https://www.yamatoseiki.com/

Manufacturing Environment & Quality Control

Our factory is equipped with 26 NC lathes, 27 machining centers, and automated systems with robots, enabling us to handle mass production.

We can handle maximum machining sizes of Φ600 mm on lathes and 2,000 × 800 × 700 mm on machining centers.

We utilize advanced inspection equipment such as 3D measuring machines, shape measuring instruments, and surface roughness testers to maintain a rigorous quality control system.

If you have any questions or concerns about our products, please feel free to contact us.

Yamato Seiki Co., Ltd.

[Tsukuba Factory] 2101 Kagesawa, Chikusei City, Ibaraki 308-0837, Japan
[Head Officce] 2115 Tamado, Chikusei City, Ibaraki Prefecture, 308-0847, Japan

Phone +81-296-25-3488

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