Maruhachi Kasei Co., Ltd. has been manufacturing resin and plastic products since its founding in 1971. Leveraging the technology and know-how we have cultivated through manufacturing industrial products such as automobile parts, we are able to consistently support the development of original products for small and medium-sized businesses and individuals, from planning to production and sales.


Stable supply of MADE IN JAPAN quality By leveraging our technological capabilities in resin and plastic product manufacturing that we have cultivated over more than half a century, and by proactively introducing new equipment, we are able to manufacture resin parts that meet a variety of needs, including lightness, strength, and design. With the quality control system cultivated through the manufacturing of automobile parts, we are able to provide a stable supply of "MADE IN JAPAN" quality.


Serious manufacturing undertaken by small factories At Maruhachi Kasei, we have built a production system that ensures strict quality control and strict delivery deadlines while undertaking the manufacturing of automobile parts and other products. We aim to manufacture products with higher precision, and also support small-lot, high-mix production.
And We are also developing our own products by leveraging our many years of know-how.
Our own brand, OUROBOROS, was born out of the desire of our representative, who is also a biker, to create glove holders that he could be satisfied with. We use high-strength resin to develop camping gear and outdoor products that are highly durable. We have received favorable reviews from many customers, including products that use phosphorescent materials that are useful for nighttime disaster prevention, and products that collaborate with famous animation works.


Strength of integrated support from product planning to sales Maruhachi Kasei is a comprehensive partner that helps customers realize what they want to create. With our many years of experience and technical capabilities, as well as the mobility that leverages our venture mindset, we turn our customers' dreams into reality.
Even if you don't have drawings or specific ideas, as long as you have hand-drawn rough sketches or images, we will do our best to support product development through careful interviews.
In addition, we can take care of everything from development to sales by leveraging our product planning, OEM, financing (crowdfunding), market development, and PR know-how on SNS, which we have cultivated through the launch and commercialization of our own brands. In addition, we utilize our strong network of partner companies to respond to a wide range of needs, not only for resins and plastics, but also for metal processing and cutting. Please feel free to contact us even if your project has been rejected by another company.


Quality standards and system building to achieve SDGs At Maruhachi Kasei, we have built a production system that ensures strict quality control and strict delivery deadlines while undertaking the manufacturing of automobile parts and other products. We aim to manufacture products with higher precision, and also support small-lot, high-mix production.

In order to achieve the SDGs, our company has built a system in which all employees produce and manage products to the same quality standards and can stably provide high-quality products. Specifically, we have established our own quality check and certification system and are developing products that use recycled materials such as bioplastics.

In terms of the environment, we are promoting sustainable production by eliminating energy consumption, noise and vibration issues by introducing energy-saving machinery, switching to LED lighting in our factories, and reducing water usage through cooling towers.

When it comes to employment, we place emphasis on employee growth and job satisfaction, and aim to improve their quality of life. We are promoting a complete five-day work week system, reducing overtime, and increasing the rate of paid leave, creating a comfortable work environment. We have enhanced training and support for obtaining qualifications, and are conducting human resource development that emphasizes ability. We will also actively recruit senior human resources and specified skill trainees.

Additionally, through the formulation of a business continuity plan (BCP) and regular training, we have built a system that enables prompt production recovery in the event of an emergency or disaster. We are proceeding with the preparation of action guidelines and communication networks in the event of a disaster, fire drills, and the installation of evacuation routes and fire extinguisher layout maps.