The Sumitomo Wiring Systems Group practices the “Sumitomo’s Corporate Philosophy,” “Basic Principles of Sumitomo Wiring Systems Group,” and “Sumitomo Wiring Systems Group Charter of Corporate Behavior” that form our corporate principles, and will develop business activities globally based on the “SWS WAY,” the core principle of Sumitomo’s wiring harness business.

Global Manufacturer of Automobile Wiring Harnesses

Sumitomo Wiring Systems was founded as an electrical wire manufacturer in 1917. Since then it has grown into a leading global company in wiring harnesses for automobiles. Active on the world stage, it has built a solid business foundation by clearly recognizing and adapting to changes over time and in the field, using technology cultivated through its experience with electrical wires.
The automobile industry is now facing a “once in a century” drastic transformation, requiring it to develop technologies in new fields such as electrification, automatic driving, connectivity and sharing. By anticipating the trends of the age and based on the technology for “connecting and connected” that we have developed in the automobile wiring harness business, we will continue to promote development of new products and technologies from the viewpoint of our customers.


The Sumitomo Wiring System Group aims to become a "mega-supplier" with wiring harnesses as the core product, strengthening our collaboration by integrating the efforts of the Group, Sumitomo Electric Industries, and AutoNetworks Technologies. We are further working to achieve the aims of "22VISION", a mid-term management plan with a final target year of fiscal 2022. SWS Group is jointly promoting three priority targets—"strengthening our manufacturing capabilities", "enhancing our strengths in development and proposals and accelerating commercialization of our products", and "improving our human resources and organizational capabilities". We will continue to combine the Group's strengths in moving ahead together and remaining connected over the next 100 years.

Connect with the Best

The primary drive of the growth of the Sumitomo Wiring Harness Group has been our steadfast commitment to acting in good faith and the trust of our clients, our strict adherence to laws and determination to conduct all business activities ethically and justly. Our motto “Connect with the Best” underpins everything we do, from the connections we develop and strive to maintain, to the transparency of our business activities that has helped us gain the trust and build the strongest relationship with clients. In addition to the connecting role our products and technologies have, we will reinforce our connections with customers, people, communities, and the world with a view to “market orientation” and focus on business activities that connect us with the future.


“SWS WAY,” the core principle of Sumitomo’s wiring harness business, forms a corporate culture that the Sumitomo Wiring Harness Group can be proud of. In this way, every single employee comes together to form a team of professionals able to take on challenges honestly and steadily, and it is thanks to this corporate culture that we have become the world’s leading producer of wiring harnesses. We will always keep in mind this fundamental core principle and continue to solidify our position as an indispensable partner to customers all over the world with the confidence and pride in working in this world-renowned company.

Sumitomo Wiring Systems, Ltd.
Representative Director
President and Chief Executive Officer