
信頼品質
Japan Quality
Precision Presswork Partner Trusted Quality by Leading Optical Manufacturers
Kotobuki Manufacturing Co., Ltd.
About Us
Our company provides integrated in-house services from the design and manufacturing of metal press molds used in digital cameras, interchangeable lenses, and video cameras, to pressing, caulking, tapping, and product assembly.
Headquartered in Tsukuba City, Ibaraki Prefecture, we meet diverse manufacturing needs with advanced technology and flexibility.

Do you have any troubles like these?
✓ Are you looking for a partner who can stably supply high-precision molds?
✓ Do you need advanced processing technology to improve the quality of your products?
✓ Are you searching for a supplier who can flexibly handle both small-lot and mass production?
Let us handle it!
Our Strength
Our strengths include a broad design and manufacturing capability, ranging from precision metal molds to molds for paper products, and the ability to handle challenging processes such as complex caulking.
For example, in wave washer production, we measure and manage spring loads from material to finished product, ensuring consistent quality.
We are also highly regarded for manufacturing AF separators that combine thin-sheet forming and coating, and for applying cost-effective, high-quality processing technologies to a wide range of specialized press components.
Wave washers
We particularly focus on the production of wave washers and precision leaf springs.We can accommodate various sizes and manufacture with high precision even for components requiring strict load management.
With years of know-how and advanced technology, we utilize various measuring instruments to achieve both quality and performance.



Promotion Video
Service
・Precision press parts machining
・Precision press mold manufacturing
Main Products
■Wave washers
■Precision leaf springs
■Other press-processed components
Company
Kotobuki Manufacturing Co., Ltd.
172 Jiyugaoka, Tsukuba City, Ibaraki Prefecture, 300-1266, Japan
Phone +81-29-876-0931
Representative | Shuta Ogino, President |
Date of establishment | June 1954 |
Number of employees | 55 |
Capital | 30 million yen |
Revenue | 700 million yen |
Certification | QMS *Certified by a major optical manufacturer (Company C) |
Corporate Website
https://www.kotobuki-seisakusho.co.jp/Manufacturing Environment & Quality Control
We employ load testers and 3D image measuring systems, maintaining strict quality control in accordance with
ISO standards and our proprietary inspection manuals.
We also emphasize process management, ensuring on-time delivery and product traceability.
If you have any questions or concerns about our products, please feel free to contact us.
Contact usKotobuki Manufacturing Co., Ltd.
172 Jiyugaoka, Tsukuba City, Ibaraki Prefecture, 300-1266, Japan
Phone +81-29-876-0931