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Minoru Kasei was founded in 1961 as a plastic molding department of its parent company, Minoru Sangyo, agricultural manufacturer as non-corrosive, lightweight and efficiently mass-produced plastic became the common material in everyday items replacing iron and nonferrous metals.
Minoru Kasei has become a leading plastic molding manufacturer in the industry with a large range of high-tech molding machines, high quality products and cost competitiveness.
With our founder’s motto that "Pre-emption and innovation make the company prosper," we have been developing original and ingenious technologies. Our pre-emptive and innovative techniques, focusing on the environment, safety and assurance, will continue to improve our outstanding products for the world and lead the development of future technology.
We have our own company constitution, our management principle. "We run our company honestly and ethically. A company can prosper when its business contributes to the development of the society it belongs to."
To make this constitution more practical and make it the keystone of our business, we created the "Minoru Kasei Credo"
We are the company our business partners can rely on. We are the company our workforce can be proud to work for and to be a part of.
We wholeheartedly appreciate your continuous support.

Junichi Ikumoto
CEO
Minoru Kasei Co., Ltd.

・ Be honest and reliable
・ Be creative and scientific
・ Have cheerful but graceful attitude
1. Run our company honestly and ethically.
A company can prosper when its business contributes to the development of the society it belongs to.
2. Grow as our customers grow.
Companies exist for their customers.
3. Respond to current business environment.
Take advantage of opportunities as they present themselves.
4. Be reliable and sound.
Initial success is easy, but continued is harder.
5. Have an inquisitive mind and a strong desire to succeed.
Pre-emption and innovation make the company prosper,
6. Let learning and experience be our driving force.
Business is run by its people.
7. Respect the organization and observe its rules.
Work closely together.
8. Build strong company as we would a family.
Cooperate in harmony
9. Have life-long company-centered commitment.
Be responsible and proud to be the part of the company.
10. The choice of our President determines the fate of the company.
Those most loyal to these company constitutions will lead the company.
To achieve prosperity for the customers, company, and employees we establish these company institutions as our trinity of our management standard.
It is our mission and responsibility to create a good company.
A good company:
-seeks material and psychological development and happiness of its employees.
-contributes to the development of the society.
-is irreplaceable.
-seeks fair return through its business.

| Company Name | Minoru Kasei Co., Ltd. |
| Members of the Board | President and CEO : Senior Managing Director : Executive Managing Director : Executive Managing Director : Director : Auditor : |
Junichi Ikumoto Takahisa Ikumoto Toshiki Sakurama Kazumichi Nishioka Tetsuya Aoyama Teruhisa Ikumoto |
| Headquarters | Address : 388-1 Shimoichi, Akaiwa City, Okayama 709-0892 Japan (MAP)Phone : +81-86-955-3434 FAX : +81-86-955-3135 [ Other ] Factory and office in Japan : 6 bases [ Overseas Minoru Kasei Group ] Minoru Kasei Hong Kong Co., Ltd. Address : Unit 1101-2, 11/F, 29 Austin Road. Tsimshatsui, Kowloon, Hong Kong. (MAP) Zhong Shan Nisei Precision Co., Ltd. No.3 Industrial Tan Zhou, Zhong Shan, China. (MAP) Minoru(Thailand)Co., Ltd. Address : 300/50 Moo1, Tambol Tasit, Amphur Pluakdaeng, Rayong (MAP) |
| Founded | November 1961 |
| Capital | JPY 45,000,000 (Own capital as of December 2008 : JPY 4.3 billion) |
| Accounting Term | Annually December |
| Number of Employees | 250 (including part-timer workers and Chinese trainees) |
| Main Business | Development, designing, manufacturing and sales of plastic products |

Our high-tech production line enables us to meet our diverse customer needs. As molding professionals, we closely consult our customers and accurately reflect their requests in our products.
We provide fast and reliable project team support.
We are fully equipped with many large blow molding machines.
We can handle large orders.
Reliable production of both small and big products.
Whether large or small, we apply the same level of care and precision to all our products. This is why many customers continue to choose us.
Processing and assembling after molding? Not a problem. We can complete the processing and assembling of the products for you.
[ Example of product ]
![]() Pleasure boat |
![]() Temporary toilet |
![]() Floating pier |
![]() Grain harvest tank |
Our innovative technology is the result of our research and cost efficient approach.
Cost reduction is one of our major concerns and we are always developing new solutions.
Our products' superior surface quality is one example. Usually multiple sanding is required before coating in order to produce a polished finish. We made the surface smooth enough during production so that we could skip the sanding process and eliminate the cost. These ideas lead to the birth of our "Heat and Cool System".
[ Example of product ]
![]() Spoiler |
![]() Side protector |
We research and develop new techniques to tap into unknown potentials of plastic.
Many of our clients request weight reduction maintaining or enhancing strength.
In response we utilize a foam molding process that expands foam in the plastic before shaping or hidden reinforcement ribs within plastic.
Foam and hidden ribs provide additional strength while reducing weight.
We meet our clients’ demands, arranging material compositions and developing new techniques.
We welcome any requests and our experienced staff takes pride in meeting them.
[ Example of product ]
![]() Front bumper guard |
![]() Bumper reinforcement(R) |
![]() Bumper reinforcement(F) |
![]() Engine cover for combine |
Meeting the manufacturing challenge.
We develop all of our products parts to fulfill the function you require.
Customer and industry requests seemed almost impossible using conventional plastic molding techniques.
Through half a century of experience, we make the impossible possible and develop leading edge products.
Different sides, different functions.
Multilayer molding meets different requirements and specifications for inside and outside the product.
Ingenious usage of metal molds and improvement on molding methods make it possible for us to manufacture complex shapes.
[ Example of product ]
![]() Instrument panel duct |
![]() Rear heat duct |
![]() Child safety seat |
![]() Starter cup |


1. We make products adhering to all regulations and customer requirements.
2. We monitor and improve our quality control system.
3. We set and achieve the highest quality standards through business innovation.
4. We invest in our employees’ development through education, training and improvement of the work environment.

[ Basic Policy ]
As a manufacturer of agricultural equipments, food-processing machines, protection of the environment is a priority. We are actively involved in environmental conservation through efficient usage of resources and the prevention of environmental pollutions.
[ Action Guidelines ]
1. All our employees recognize our environmental policy and goals and we face the challenges together.
2. We regularly review and improve our environment management system.
3. We observe all environmental laws, regulations and other requirements.
4. We promote the development of products with minimal environmental impact and procurement of eco-friendly materials.
5. We promote 5R activities (Reduce, Reuse, Recycle, Repair and Renew) through our production and manufacturing process.
6. We are active participants in local environmental initiatives and work closely with the community.
Copyright © 2009 Minoru Kasei Co., Ltd. All Rights Reserved.