About Us

Top
Company

MESSAGE
Greetings from the Representative Director
FROM DECOMMISSIONING TO SPACE
From Nuclear Decommissioning to Space
At Yoshida, we’re always looking for new challenges and ways to grow. Since our founding in 1923, we’ve built over 100 years of experience and history. In 1961, we became the first company in Japan to design and manufacture gloveboxes, marking our entry into the nuclear industry. Our strength lies in our in-house integrated production system, where design, fabrication/welding, and machining departments work closely together. This allows us to create products that fully meet our customers’ needs. In recent years, we have been actively engaged in research and development, collaborating with universities, research institutions, and venture companies on a variety of projects. These include the development of next-generation gloveboxes with remote operation capabilities and the verification of separation methods for organic solvents used at the Fukushima Daiichi Nuclear Power Plant. We are also exploring new ways to apply our proprietary technologies, such as adapting the shielding and containment techniques developed during the Fukushima decommissioning work for use in fields like medicine and aerospace. We strive to be the company our customers turn to when they face challenges, and we will continue to build a system that enables us to fully realize their requirements. Thank you for your continued support.
Representative Director
Shusuke Yonekawa
HISTORY
Company History
1923
April
Hisao Yoshida, the founder, established the business as a sole proprietorship at 817 Hon 8-chome, Mito City.
1940
August
A factory was established in Minamimachi, Mito City, under the name Tsuruta Second Ironworks.
1945
December
The factory relocated to 7985 Tanaka, Nakaminato City, and began operations under the name Yoshida Ironworks.
1959
April
The company changed to a corporate structure and was established as Yoshida Ironworks Inc., with Ken Yoshida appointed as President.
1961
March
Secured contract to supply gloveboxes to the Power Reactor and Nuclear Fuel Development Corporation.

1965
February
New large-scale machinery factory established at 2363 Shiogasaki, Tsunezumi Village.

1966
April
Hisamitsu Yoshida appointed as President.
1969
April
New welding and fabrication plant was built.
1970
April
The Shimodate Factory was newly established at 1400 Ogawa, Shimodate City.
1976
March
Yoko Yoshida appointed President.
1992
February
The company reorganized as a corporation and established as Yoshida Inc.
1993
May
New office and factory completed.

2009
January
New warehouse established in Koizumi-cho, Mito City.
2018
June
Opened a new head office factory in Rokutanda-cho, Mito City.


2022
July
Shusuke Yonekawa appointed President.
CERTIFICATION
Certifications
Construction Industry License Certificate Issued by the Governor of Ibaraki Prefecture (General) No. 18040 (Plumbing and Pipework / Machinery and Equipment Installation)
2017
ISO 9001:2015 Certification Acquired
2017
ISO 14001:2015 Certification Acquired
2017
Recognized as a Superior Factory by Mito City
2018
Recognized as a Key Company Driving Regional Economic Growth
June 2019
Recognized as a Top 300 Growing SME






COMPANY
Company Overview
Company Name
Yoshida Inc.
Representative Director and President
Shusuke Yonekawa
Established
April 1923
Capital
15,000,000 yen
Phone Number
029-297-1005
Fax
029-297-1008
Employees
70
Business
Design, fabrication, installation, and maintenance services as listed below. Various equipment for nuclear facilities Energy-related equipment Pharmaceutical equipment Aerospace-related equipment Other and Related Business Areas
Main Banks
Mitsubishi UFJ Bank / Mito Branch Ibaraki Prefecture Credit Union / Shimoichi Branch Shoko Chukin Bank / Mito Branch Joyo Bank / Head Office

Head Office Factory
1279-1 Rokutanda-cho, Mito City, Ibaraki Prefecture, 311-1135, Japan

Shiogasaki Factory
2363 Shiogasaki-cho, Mito City, Ibaraki Prefecture, 311-1114, Japan

Koizumi Warehouse
213-1 Koizumi-cho, Mito City, Ibaraki Prefecture, 311-1111, Japan

Fukushima Office
Okuma Incubation Center, 230 Shimonogamishimizu, Okuma Town, Futaba District, Fukushima Prefecture, 979-1308,Japan.