Message from the President

Throughout its history, Seiwa has manufactured a variety of processed products made of stainless steel. We excel at applying our many years of experience and the most advanced welding and processing techniques to the manufacture of products that our customers can use with complete confidence.
In recent years the relationships between the consumer and the products they buy has been changing significantly.
Regardless of the type of product in question, neither the manufacturer nor consumer can ignore its contribution to the global environmental and energy problems we face. Our corporate goal is to contribute to the health of the global environment and the conservation of energy by employing the expertise we have gained from the manufacture of stainless steel cylinders for electric water heaters.
Having adopted a corporate philosophy of demonstrating our commitment
to society through ceaseless innovation, we will continue to attribute
our success to the support of our customers and the public at large
as we create products that meet changing needs in step with
the evolution of technology.
Moreover, our goal is to instill this spirit
of innovation in all our employees and
contribute to their personal growth.
In closing, I would like to express
my appreciation for your support
and patronage as we continue to
dedicate ourselves to the challenge
of ceaseless innovation.

Company Outline

Name Seiwa Industrial Corporation
Business established April, 1962
Company founded December 15, 1965
Head office 3-105 Kitahonmachi, Itami, Hyogo 664-0836 Japan
and Main Plant Phone:+81-72-782-0281
URL:http://www.seiwa-ic.co.jp
Nara plant Showa Industrial Park, 1 Shigicho,
Yamatokoriyama, Nara 639-1039 Japan
Phone:+81-743-56-1062
Fukuchiyama plant 2758, Aza Osada Oono Shimo, Fukuchiyama, Kyoto 620-0851 Japan
Phone:+81-773-20-1135
Capitalization 24,000,000yen
Corporate officers Chairman       Kouji Hara
President      Seiichi Yamashita
Executive director  Kazuo Kashiwamura
Director       Katsuhiko Hara
Auditor       Yukari Yamashita
Annual Sales 4.2 billion yen(2017)
Number of employees 250
Bank references Senshu Ikeda Bank, Mukonoso Branch
Mitsui Sumitomo Bank, Itami Branch
Risona Bank, Kawanishi Branch
Primary businesses Manufacture of residential equipment
 (Electric water heaters, water heaters, commercial
 hot water tanks, etc.)
Manufacture of industrial environment equipment
 (Environment testers and testing equipment for research
 facilities, medical stainless steel products, boiler tanks,
 etc.)
Manufacture of equipment for space travel
 (Battery cases, etc.)

Corporate History

1962 Stainless steel processing and commercial kitchen equipment Manufacturing business is established.
1965 Company is incorporated.
1968 Manufacturing of tanks for small stainless steel electric water heaters begins.
Company enters the electric appliance market
1971 Production of mid-size enamel-lined tanks for electric water
heaters begins(with development of inner-surface welding technology.)
1974 Japanese Defense Agency awards the company MIL certification for stainless steel spot welding. Nara Plant is opened.
1977 Company is registered as a manufacturer of electric heating appliances.
1978 Assembly of small water heaters begins.
1983 Sterilizing hand washer is marketed.
1985 Company is granted a practical-use patent for its sterilizing hand washer.
Small stainless steel electric water heater is developed.
Production of mid-size cylindrical stainless steel electric water heater begins.
Inner-surface welding technique is refined.
1990 Company is granted a patent for its high-grade ferrite stainless steel cylinder manufacturing technique.
1996 Main Office plant No.2 begins operation.
2000 Main plant is awarded certification of registration with ISO14001.
Production of a high-pressure electric water heater begins.
2004 Main Office and Nara plant is awarded certification of registration with ISO9001
2005 Production of parts for fuel cells begins.
Nara Plant is awarded certification of registration with ISO 14001.
2006 Main Office plant No.2 expanded
2007 Fukuchiyama plant starts construction
Patent received for structural welding of cylinders
2008 High-volume production of steam reformers for fuel cells begins
Production of water heaters for aircraft begins
2009 Assembly of household heat pump-type water heaters begins
2011 Assembly of industrial heat pump-type water heaters begins
2013 Hot beer server commercialization.
2014 Production of fuel cell power generation module housings begins
2015 Fukuchiyama plant is awarded certification of registration with ISO 14001,ISO 9001
2017 High-volume production of HYDOROTYZER begins

Major Customers

Panasonic Corporation
TOTO LTD.
TOTO AQUA TECHNO LTD.
LIXIL Corporation
Nihon Itomic Co.,LTD.
Takara Standard Co.,Ltd.
SHIHEN TECHNICAL Corporation
DAIKIN INDUSTRIES, LTD.
SANDEN RETAIL SYSTEMS CORPORATION
SANDEN LIVING & ENVIRONMENTAL SYSTEMS CORPORATION
MITSUBISHI ELECTRIC CORPORATION
DENSO CORPORATION
Aisin Seiki Co.,Ltd.
Espec Corporation
Yamato Scientific Co.,Ltd.
Rinnai Corporation
PURPOSE CO.,LTD.
GASTAR Co.,Ltd.
MINATO MEDICAL SCIENCE CO., LTD.
TIGER SANGYO CO.,LTD.
GS-Yuasa Corporation etc.




Product

Contributing to comfortable lifestyles
through hot water

Water heaters are indispensable commodities that support affluent lifestyles. Seiwa has contributed significantly to the evolution and acceptance of electric water heaters. Our technologies have been used in a wide range of applications including the fuel cell systems that are attracting attention as cogeneration systems for residential use, testing and inspection equipment for use in research facilities, and even water heaters for use in aircraft. Here, we introduce just some of these products.

Environmental devices for
industrial applications

We are engaged in the manufacture of various types of environmental equipment including testing and inspection equipment for academic and corporate research institutes, water heaters used in offices and hot water tanks in vending machine, and small-scale water treatment equipment for water purification plants. In addition, we also manufacture industrial hot water tanks, called “Eco Cute” which can provide supply a large capacity of hot water with high efficiency.

Aerospace products

Seiwa manufactures small electric water heaters for aircraft and stainless steel battery cases for defense equipment.

Residential-use products

We have been manufacturing compact household electric water heaters, medium-sized electric water heaters, and “Eco Cute” (heat pump type) water heaters. The hot water storage tanks employed in these products have been manufactured with Seiwa's renowned cylinder welding technology. In addition, we also manufacture reforming units and components for use in fuel cells, which are attracting attention as household cogeneration systems.




Technology

Seiwa technologies are backed by
ceaseless day-to-day effort

Thin-sheet stainless steel welding technology that accounts for corrosion resistance and high-temperature strength is an indispensable technology for manufacturing the component parts of fuel cells and water heaters.
In order to create these products, it is important to understand adequately the characteristics of various types of stainless steel materials. In order to accurately reflect the needs of our customers and produce satisfactory products, we have dedicated ourselves to the challenge of constant innovation.

Design and structural analysis

We design various products and perform structural analysis using 3D CAD.
Results from analysis of design verification tests and prototype evaluation are incorporated into product design to deliver high-quality finished products.
We also investigate methods for the optimization of material thickness and welded joints.


Product development grounded in
close cooperation with manufacturers

Our small- and mid-size water heater segment has long benefited from our commitment to excellence in every step from planning to production.
However, we are quickly establishing a record of experience and results in another area as well.
Specifically, we are now combining our special welding technology derived from many years of experience in stainless steel fabrication to the field of industrial environmental devices.
As a result, we are participating in the planning stages of development of environmental testers and test equipment for academic and corporate research facilities.
Moreover, we have become increasingly active in the area of medical applications of stainless steel products.




Quality

Quality control and quality assurance

When responding to requests from customers, we put quality first and pay careful attention to all processes from material selection, dimensional precision, and appearance to welding, assembly, and shipment.

Selecting the most suitable stainless steel alloys

Stainless steel alloys with high corrosion-resistance are used in water heater tanks and similar products, but there is a huge array of such materials available.
We accurately assess your needs and help you select the right material in consideration of factors such as usage conditions, processing methods, durability, and cost.


Testing pressure and corrosion resistance

We ensure that we are able to supply reliable products through a variety of quality tests including pressure tests in which the inside of the tank is subjected to high pressure; repetitive pressure tests to estimate the stress life of welds; and corrosion resistance tests, in which the corrosion of welded parts of various stainless steel materials is investigated.




Manufacturing

Delivering products that provide peace of mind

We analyze weld strength and corrosion resistance and verify designs through prototype analysis. By reflecting the results of these activities in product design, we are able to supply products that provide customer satisfaction.
The various automatic welding machines, jigs, and other equipment we use in production are made in house.
Seiwa employees put their heart into everything we make, every step of the way from design and analysis to evaluation and the final product.