Metal Products

amaguchi Prefecture

~World’s First Household System for Water Heating and Air Conditioning in a Single Unit~

Established in 1954

Corporate Strengths

Chofu Seisakusho, with its corporate headquarters in Shimonoseki, Yamaguchi, is a total manufacturer of housing equipment. We develop and sell the water heaters as the only Japanese manufacturer that utilize all energy sources, such as oil, gas, electricity, and solar power. Our goal as a “company that creates comfort” is to achieve a society that is friendly to both people and the environment.

Unique, Best-Selling Products and Services

■  “OMX” hot water, air conditioning, and ventilation system using solar power and exhaust heat.

With the technology and know-how we have accumulated over many years, we developed the world’s first household system for both hot water and air conditioning (cooling, heating) in a single unit, instead of separate heating and cooling units. Heat from the sun and in the atmosphere, which differs in summer and winter, is efficiently controlled and used for indoor heating and water heating. In addition, the heat that is generated through ventilation is used, as needed, to reduce the necessity of energy for heating and cooling. This is a highly efficient and next-generation energy-saving system for households.

Appeal to New Graduates/Mid-Career Recruits

We provide a full range of services from product development to manufacturing and sales. Our corporate culture encourages young people to take an active lead and attempt new challenges in order to grow, in a variety of fields regardless of educational background.

  • Headquarters plant


  • Inside the plant

Company profile

Address 2-1, Chofuogimachi, Shimonoseki City, Yamaguchi Prefecture
TEL (083)248-1111
Capital ¥7.000 billion
Number of employees 1,400 (consolidated)
Sales ¥49.700 billion
Main overseas locations none
Hiring foreigners None hired in the past, willing to hire more

Pick up Companies

  1. Asagoe Industry Co., Ltd.

  2. Hakuhodo Company, Limited

  3. RENIAS Co., Ltd.

  4. Mishima Foods Co., Ltd.

  5. Satake Corporation

  6. Marine Products Kimuraya Co., Ltd.