SEIKO DENKI LTD. Official Website

Message President’s Message

Entrusting the Life of a Product to a Single Harness

At Seiko Electric Works, we manufacture wire harnesses for industrial equipment at our Ichijima and Kashiwabara plants in Tamba, Hyogo Prefecture.
Although the wire harnesses we produce are embedded inside machines and are not visible from the outside, they play an indispensable role.If compared to the human body, they function like nerves that transmit information from the skin to the brain and send signals from the brain to the muscles — and like blood vessels that carry blood from the heart throughout the body.
In the same way, wire harnesses are vital components that enable machines to function properly.
From wire cutting to continuity testing, every process is handled with precision, responsibility, and sincere dedication.
Delivering trust and quality from Tamba to the world — that is our enduring commitment.

President Hideki Takahashi

Management Philosophy Management
Philosophy

We strive to continue contributing to society through reliable technology, while connecting hearts like a wire harness — linking our customers, suppliers, and employees in mutual support and gratitude.

Quality Policy Quality Policy

Every employee is committed to maintaining a customer-oriented perspective, continuously improving quality, and delivering safety and satisfaction through manufacturing that earns our customers’ trust.

Quality Objectives Quality Objectives

We are committed to preventing the recurrence of quality defects and, Kaizen Activities, aim to enhance quality and achieve zero customer complaints.

Pursuing stable quality and process efficiency through QC circle activities
Creating a workplace free of uncertainty through work standardization
Strengthening the PDCA cycle for continuous quality improvement
Enhancing employee awareness of quality through the ongoing implementation of small improvement proposals

Environmental Policy Environmental Policy

Environmentally Conscious Manufacturing Based on ISO 14001, from Tamba

In March 2006, Seiko Electric Works obtained ISO 14001 certification, the international standard for environmental management systems.
Since then, we have valued environmentally friendly manufacturing in harmony with the natural surroundings of our hometown, Tamba.
We are committed to the effective use of resources and energy-saving activities, ensuring that not only our factories but each of our employees acts with environmental awareness in their daily work.
Moving forward, we will continue to take sincere and steady actions toward a sustainable future, walking together with our local community.

Company Profile Company Profile

Company Name	Seiko Electric Works Co., Ltd.
Address	【Head Office:Kaibara Factory】〒669-3314 106 Aguta, Kaibara-cho, Tamba-shi, Hyogo, Japan TEL：0795-70-2059 FAX：0795-73-5595 【Ichijima Factory】〒669-4321 1062 Uegai, Ichijima-cho, Tamba-shi, Hyogo, Japan TEL：0795-85-0201 FAX：0795-85-2556
Capital	¥10,000,000
Founded	January 1970
Representative	Hideki Takahashi
Area	【Kaibara Factory】Site Area: 1,500 m² Building Area: 600 m² 【Ichijima Factory】Site Area: 6,500 m² Building Area: 500 m²
Number of Employees	【Domestic】22【Overseas】Vietnam：18名 Malaysia：300名
Business Description	Wire Harness Manufacturing
Business Partners	・ESPEC Corp. ・SHIBAURA VENDING MACHINE CORPORATION ・NIDEC OHTOYO KIKO CORPORATION ・Panasonic Connect Co., Ltd. ・Panasonic Switchgear Systems Co., Ltd. ※Company names are listed in Japanese syllabary order.
Main Banks	The Minato Bank, Ltd. Kaibara Branch, Kaibara Branch、 The Nakahyogo Shinkin Bank, Ichijima Branch
Parent Company	Tamurakoma Co., Ltd. https://tamurakoma.co.jp
Group Company	・SEIKO INDUSTRIAL CORP. LTD. (Established June 1978) – Domestic sales and trading operations ・SEIKO DENKI (M) SDN. BHD. (Established March 1991)-Manufacturing and sales in Malaysia ・SEIKO DENKI (S) PTE. LTD. (Established October 1990)- Procurement and sales in Singapore

History Company History

January 1970	Start of production of thermistors and varistors
May 1976	Start of trading operations and domestic sales
September 1983	Start of wire harness production
July 1988	Start of wire harness production in China
October 1990	Start of procurement and sales operations in Singapore.
July 1996	Start of cell-based wire harness production at the Kaibara Factory.
May 2003	Start of sales, purchasing, and shipping operations at the Kaibara Factory.
January 2006	Start of web and programming services for small-scale systems.
March 2006	SObtained ISO 14001 environmental management certification (Kaibara and Ichijima factories).
October 2010	Start of wire harness production in Vietnam.
December 2019	Became a member of the Tamurakoma Co., Ltd. group.
January 2025	Celebrated the 55th anniversary of the company’s founding.

会社概要 Company