Company Profile

Corporate Philosophy

To contribute to the enrichment of society through our mastery of manufacturing and scientific knowledge.

Management Philosophy

To strive for daily progress, as if climbing a 1mm step at a time, and to co-create new possibilities together as a team.

Quality Policy

We constantly aim to improve quality and provide products trusted by our customers. In addition to complying with all laws, regulations, and other agreed-upon requirements, we are committed to the following:

１．All employees will unite to improve customer satisfaction.

２．To implement this Quality Policy, we will establish clear quality objectives, conduct activities to achieve them, and verify the results. We will also periodically review our quality management system to ensure continuous improvement.

３．We will build a framework to ensure our unique expertise—our "advanced glass processing technology and experience"—is passed on to the next generation.

Message from the FounderFounder Yoshihiro Onizuka

"A daily effort, like climbing a 1mm step at a time."

[Oct. 2007] Tokyo Metropolitan Government Award for Distinguished Service
[Apr. 2012] The Order of the Rising Sun, Gold and Silver Rays

Message from the PresidentPresident Chikako Onizuka

Our company specializes in glass processing. It is a world of artisans, involving a great deal of manual work. Yet, in addition to the precision and care of craftsmanship, we are also a manufacturer required to deliver both speed and volume.
To continue achieving this, we make a daily effort to "climb a 1mm step at a time," as stated in our management philosophy. By refining ourselves and our skills, we aim to be a company that satisfies our customers through continuous growth.
Furthermore, we hope to contribute to society and enable all our employees to lead richer, more fulfilling lives.

Company Profile

Company NameOnizuka Glass Co., Ltd.

RepresentativeChikako Onizuka, President & CEO

Address3-9-18 Imai, Ome-shi, Tokyo 198-0023, Japan

TEL+81-428-31-4305

FAX+81-428-31-3392

FoundedJanuary 1967

Capital30 Million JPY

SubsidiaryWachi Seiki Co., Ltd.

Company History

Jan. 1967Founded by Yoshihiro Onizuka in Tanashi-shi, Tokyo.

May 1971Established as Onizuka Glass Works Co., Ltd.

Jan. 1973Relocated to Ome-shi, Tokyo.

Oct. 1989Constructed the former head office building.

Oct. 1997Reorganized as Onizuka Glass Co., Ltd.

Mar. 2010Relocated to the new and current head office.

Aug. 2017Yoshihiro Onizuka appointed as Chairman.

Chikako Onizuka appointed as President.

Aug. 2022Acquired ISO 9001:2015 certification (for the manufacturing of glass cuvettes).

Dec. 2024Certified as a "Health & Productivity Management Outstanding Organization (Silver)."

Apr. 2025Relinquished ISO 9001:2015 certification.

May 2025Introduced a proprietary quality management system.

(covering Manufacturing, General Affairs, and Quality Assurance)

Awards

Sep. 2012Received the "Excellence Award" at the 10th Annual Award for Courageous Management,
hosted by the Tokyo Chamber of Commerce and Industry.