Continuing to Create the Essential Internal Grinders, Guided by Our Principle of “Unwavering Precision.”
Corporate Philosophy
We continue to create internal grinding machines that are essential, no matter the time or place, guided by our core principle of “unwavering precision.”
Message from the President
On March 23, 2020, IRINO KIKO Co., Ltd. inherited all operations of Yamada Koki Co., Ltd., a company that has supported Japan’s manufacturing industry. We have taken over the legacy of more than 70 years of history and over 3,000 units of internal grinding machines produced. While respecting the fundamental design of Yamada Koki’s world-renowned high-precision and high-durability general-purpose internal grinding machines, we are striving to further improve quality.
Japan is currently facing a declining labor force due to an aging population and low birth rates, making the succession of manufacturing technologies a critical issue. At our company, we actively hire local young people and international students who are interested in manufacturing. Through direct guidance from experienced workers and by visualizing knowledge and sharing information in company-wide meetings, we ensure that techniques and know-how are passed on to the next generation.
Our philosophy of “unwavering precision” emphasizes remaining resilient and steadfast in solving problems and taking action, no matter the circumstances. It is our mission to continue creating internal grinding machines that are needed anywhere in the world, at any time.
We promise to continue adapting flexibly to the changes of the times and to overcome the challenges of this new era together with both our long-standing customers and new business partners.
We greatly appreciate your continued support of IRINO KIKO Co., Ltd.
August 2024
Norio Irino,
President, IRINO KIKO Co., Ltd.
Our History
For troubleshooting and repair requests, please contact us here.
Our dedicated support team will respond promptly and assist in maintaining your product in optimal condition.
The Birth of Irino Kiko
Irino Kiko Co., Ltd. is a manufacturer of machine tools that combines tradition and innovation.
In 2020, we took over the internal grinder manufacturing business from Yamada Koki Co., Ltd., which has produced over 3,000 units. We now manufacture precision internal grinders at our factory in Yokosuka, Kanagawa.
Technological Innovation and Contribution to Society
Our technology is essential for the manufacturing of precision components in a wide range of industries, from automotive to aerospace. Our relentless pursuit of excellence and innovation in product design continues to ensure the precision and rigidity of our products, delivering trust and peace of mind.
Passing on Technology and Talent
Despite the challenges posed by an aging population and declining birth rates, we are committed to passing on our technical expertise and nurturing the next generation of engineers who will support Japan’s future. We actively promote knowledge-sharing and mentoring from experienced craftsmen to younger engineers, creating an environment where free thinking and creativity are encouraged, without the barriers of age or position.
Vision for the Future
We are committed to continuous challenges. We will leverage the skills and experience we have built to keep producing high-quality products. We will also adapt flexibly to market trends both domestically and internationally, continuing to manufacture internal grinders in Yokosuka that everyone can use with confidence.
Towards the Realization of a Circular Society
Our remanufacturing program, started in 2020, involves disassembling used machines made by our company (and Yamada Koki), sorting and cleaning reusable cast materials, and using only parts that meet our internal standards to remanufacture the machines.
Our remanufactured machines are produced using the same processes and on the same floor as new machines, resulting in a remanufactured machine that offers the same or even better precision than the original product.
Our remanufactured machines are eligible for certification by the Japan Machine Tool Builders’ Association.
Company Overview
| Company Name | Irino Kiko Co., Ltd. |
| Established | March 16, 2020 |
| Capital | 10 million yen |
| CEO | Noriko Irino |
| Director | Yumiko Sugai |
| Director, Factory Manager | Katsutoshi Yamagata |
| Director, Sales Manager | Hiroaki Takeuchi |
| Technical Advisor | Shigeaki Mitsuhashi |
| Location | [Headquarters] 2-4-16 Ryoke, Kawaguchi City, Saitama, 332-0004, Japan [Factory] 1-3-23 Uchikawa, Yokosuka City, Kanagawa, 239-0836, Japan |
| Contact | Phone. 046-874-7444 Fax. 046-874-7911 |
| Business Activities | Manufacturing, sales, and repair of internal grinders and spindles |
| Banks | Takino-gawa Credit Union, Yahei Branch Bank of Yokohama, Kitakurihama Branch |
| Fiscal Year End | December 31 |
| Website | https://irinokiko.co.jp/ |
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Headquarters Map
Factory Map
Business Hours: Weekdays 8:30 AM - 5:15 PM / Closed on weekends and public holidays