Thank you very much for your visit.
A company lasting 100 years at the top of the global niche - this is what RIKAZAI is aiming for.
Since Rikazai's founder devised theory of rolling and produced ultra thin foils through implementation of its theory in 1947, RIKAZAI has produced and delivered high quality precision-rolled foils and plates of various metals to our customers in aviation, aerospace, semiconductor, electric/electronic. precision measurement equipment, industrial equipment/ instruments industries.
Further, based on expertise of precise metal rolling technology, RIKAZI offers metal processing solutions including plating, responding to customers' requirements as a partner in research, trial manufacturing and production.
"RIKAZAI" for Metallic Foils/ Plates”, we are confident that we can deliver our ‘best of breed’ solutions to fully satisfy our customers’ requirements and needs.
President & CEO
Established: November 19, 1947
Representative: Yoshio Komuro, Representative Director
Capital: 20 million yen
Number of employees: 25
Headquarters location: 〒 211-0011
1810-7 Shimonumabe, Nakahara-ku, Kawasaki-shi, Kanagawa
Business: Manufacture and sale of various rolled metal foils Manufacture and sale of secondary processed metal products
Our Management Philosophy
We timely deliver products and services of excellent quality,
and contribute to society through people-
and environmentally-friendly corporate activities.
of a sound
for high quality
The framework of our management philosophy
The founder Junichi Akiyama (Founding president of Kanto Special Steel Works) established Rikagakuzairyo Co., Ltd., in Fujisawa City, Kanagawa Prefecture, opening a laboratory glassware workshop in the Fujisawa premises of Tokyo Gas and a metal rolling workshop in Oi-Samezu Town, Shinagawa Ward, Tokyo.
The President of the Japan Institute of Invention and Innovation, the late Prince Takamatsunomiya visited the metal rolling workshop and observed the foil rolling process.
Akiyama presented his theory of foil rolling processing at the autumn meeting of the Institute of Metals and Materials, and on the recommendation of the Ministry of International Trade and Industry exhibited foil products at the World Metallurgical Congress held in Detroit, USA.
Production of FRD (Fuso Japan metal Rikagakuzairyo joint development material Duralumin) diaphragms for audio equipment, adopted by Tokyo Tsushin Kogyo Co., Ltd (now Sony)
Completion of main factory at present location, 1810-7 Shimonumabe, Nakahara Ward, Kawasaki City
Contract to produce metal foils for the USA
Contract to produce metal foils for West Germany
Shigeo Akiyama was inaugurated as President and CEO
Titanium etc., rolled to a thickness of 0.003mm (= 3μm)
Remodelling of main factory completed, new installation of cold reversing 20-Hi rolling mill (product guaranteed thickness 0.003mm = 3μm) manufactured by Sundwig Co., Germany
Manufacture and sale of titanium coiled foil with a thickness down to 0.001mm (= 1μm), from the 20-Hi rolling mill
On the 40th anniversary of the company’s founding Rikagakuzairyo Co., Ltd., was renamed RIKAZAI.
Seiji Nohara was inaugurated as President and CEO
Office work was streamlined with the introduction of computers and accounting software
Connection to network, start of electronic ordering and order receipt
Accredited as a Green Partner by Sony Corporation
Accredited for Green Procurement by Canon Group
Yoshio Komuro was inaugurated as Representative Director
Completion of new building, start of business
Accredited as a Green Partner by Nikon Corporation
Accredited as a Kawasaki City Monozukuri Brand
Awarded both the KIP Prize and the KNBC Prize at the Kanagawa Business Audition
Held a mascot-character competition in an industry-academia collaboration with Nihon Kogakuin
First solo exhibition at COMPAMED 2019 (International exhibition of medical device technology and components) in Germany
Received the 2019 Kanagawa Prefecture Excellent Factory Award
Registration as a Kanagawa SDGs Partner (4th term)
Introduction of teleworking (from home) / establishment of teleworking regulations
Construction of wireless LAN in the factory in our headquarter
Start of our new website and our online store
Certification as "1st Kawasaki SDGs Gold Partner"
Kawasaki City Award for Businesses Promoting Workplace Reform and Productivity Improvement
The late Prince Takamatsunomiya
visited the metal rolling workshop.
of Rikagakuzairyo Co., Ltd.
Received the 2019 Kanagawa
Prefecture Excellent Factory Award
Kawasaki City Award for Businesses Promoting Workplace Reform and Productivity Improvement
A man from the same town as the Buddhist monk Ryôkan
There was a man named Junichi Akiyama who was born in Izumozaki.
He said he wanted to eat fugu globefish in Shimonoseki and I treated him to an unsophisticated meal prepared Western-style; he went off to eat it alone and came back in high spirits.
After resigning as president of the Kanto Special Steel Works, a subsidiary of Sumitomo, he founded a company that did extremely thin rolling of precious metals such as nickel and molybdenum. Saying it was in the national interest, he put up with losses and looked forward to the future.
He did a lot for me, saying it was a thank-you for the two years he suffered with stomach ulcers, and anyway he lived close by.
His little workshop that no one knew about was visited by Prince Takamatsunomiya.
The day will surely come when the faithful Akiyama will be rewarded.
（From Sumitomo Kaisoki, (a memoir of the Sumitomo years), by Jun Kawada)
Main Business Partners
Toyota Central R&D Labs., Inc.
Honda R&D Co., Ltd.
MAGNEX CO., LTD.
CANON ELECTRONICS INC.
Sony Global Manufacturing
& Operations Corporation
Tokyo Electron Ltd.
Space / Defence
Tokyo Aircraft Instrument Co.,Ltd.
Hitachi-Johnson Controls Air Conditioning, Inc.
KYOWA ELECTRONIC INSTRUMENTS CO., LTD.
Glosel Co., Ltd.
Kett Electric Laboratory
SANKO ELECTRONIC LABORATORY CO., LTD.
SHOWA MEASURING INSTRUMENTS CO.,LTD.
Hamamatsu Photonics K.K
Alpha Rion Co., Ltd.
Taiyo Koko Co., Ltd.
Mitsubishi Materials Corporation
Trading companies / Wholesalers
INDUSTRIAL SUPPLIERS CO.,LTD.
Suzuki Shokan Co., Ltd.
Hayashi Kasei Co., Ltd.
MURATA YOUHAKU ＆ CO.,LTD.
ALPHASEIKO CO., LTD.
KOKEN CHEMICAL CO., LTD
Senzoku Quality KK
Nano-Process Co., Ltd.
Hirai Seimitsu Kogyo Corporation
Maznaga Precision Co.,Ltd
National Institute of Advanced Industrial Science and Technology
National Institute of Materials Science
Institute of Physical and Chemical Research
Research Institute for Electromagnetic Materials
High Energy Accelerator Research Organization
Various graduate school laboratories, universities /
technical college laboratories
QMS（Quality Management System）
Our aim is to contribute to society through the prompt delivery of high-precision,
high-quality products that are trusted by our customers and meet their needs.
We will strive to improve customer satisfaction with respect to quality, delivery times, service and information.
We will build, implement and maintain a quality management system enabling us to provide better products and make continuous improvements to ensure that the system functions effectively.
To support both our traditions of craftsmanship and new creativity, we will develop human resources and promote the improvement of processes and product quality.
Through a system of internal and external cooperation, we will strive to determine the cause of defective items and to prevent their recurrence, and aim to generate no complaints.
❶Communication with customers
In order to achieve short delivery times and high quality and thus provide our customers with satisfactory products, we
value communication with our customers.
Our sales and technical staff work together to make suggestions tailored to the customer’s needs, providing technical
support from the selection of materials to the processing method.
We use the distinctive metal processing technologies we have developed over many years through our system of internal
and external cooperation, to achieve the highest level of quality.
We dare to try out prototypes and products in development, to meet the diverse needs of our customers.
❸Human Resource Development
We provide a wide range of education and training in quality, technology, environment, hygiene, etc., including QMS training
by instructors from within and outside the company.
Along with the development of education and training programs based on ability assessment, in order to pass on to the
next generation the skills and know-how of our veteran workers we promote multi-skill development, the establishment of
work standards and on-the-job training.
EMS（Environment Management System）
IWe are building an environmental management system based on ISO14001, and developing
environmentally-friendly business practices.
RIKAZAI Co. Ltd., recognizes that, while being a part of economic growth and technological development, environmental problems are a factor in the destruction of nature and a threat to life. Considering the achievement of a low-carbon society to be a key issue, we promote business activities that will provide high-quality products from a minimum of resources and energy.
Our organization has a shared awareness of our need to provide high-value-added products and reduce our environmental impact.
In our environmental activities and the promotion of SDGs, we will strive to prevent pollution, focusing on the following items.
1. We will implement personnel training and enhance efficiency through the improvement of quality and business operations.
2. We will prepare for natural disasters by responding to climate change through the preparation and operation of a BCP.
3. We contribute to the effective use of scarce resources by developing thin foil processing technology.
4. Taking marine pollution and forest protection into consideration, we will promote the reduction of plastic waste and the recycling of paper.
We comply with the laws and regulations relating to business activities, and respond to other requirements within the scope of our voluntary public commitments.
Based on our business plan, we promote our environmental activities by setting environmental targets in each field, drawing up an action plan, quantifying the level of achievement and carrying out regular reviews and revisions.
In addition to working to raise our employees’ understanding of our environmental policy and their environmental awareness, this environmental policy will be disseminated outside the company in order to publicize it including to the companies with which we cooperate.
3.Scope of application
Target organization：RIKAZAI Co. Ltd. Main Factory
Location：1810-7 Shimonumabe, Nakahara-ku, Kawasaki City, Kanagawa Prefecture
Activities：Manufacture and sale of precision-rolled foils and plates in various metals, and products processed from the same
〔Compliance with laws and regulations〕
We are working on compliance in order to carry out fair and transparent
corporate activities in good faith, in line with domestic law and social norms.
For better environmental performance,
we review our EMS on a regular basis and strive continuously for improvement.
As part of our social contribution activities, we continue to make donations
to UNICEF and the Japanese Red Cross Society.
We work to raise safety awareness in order to maintain our record of zero
traffic accidents involving our company vehicles as well as zero accidents
occurring in the manufacturing process. (The 7 vows of road safety)
In normal times, we formulate and prepare BCP to be put into practice in
times of emergency or disaster. Flood barrier installation trainings, disaster
trainings, etc. are carried out regularly.
Sorting tray for scrap waste
Water stop plate