Yokowo Expands Connector Technology for Next-Gen Devices

CHIYODA-KU, TOKYO, JAPAN, September 30, 2026 /CourierPR/ -- Yokowo, a Japanese company known for its innovative connector technology, has been at the forefront of advancing electronic device connectivity for decades. The company's Fine Connector business, which began in the 1980s with the development of the spring connector (SPC), has since expanded to support a wide range of applications and markets.

In the 1980s, the SPC was first adopted as a signal contact for earphones used with compact radios. By the 1990s, its use had expanded to battery connections in mobile phones, supporting the growth of the Fine Connector business. Today, SPCs are used in a variety of applications, including charging contacts in increasingly compact and lightweight wearable devices such as wireless earbuds, smartwatches, and smart glasses. They also serve as charging contacts for mobile computers and tablets used in logistics operations.

Yokowo’s strong customization capabilities enable the development of connector solutions tailored to customer requirements. These solutions address a wide range of needs, including reliable connections in demanding environments, space-saving designs, high-speed transmission, high-current applications, and installation in extremely limited spaces. The company’s expertise in contact design has allowed it to propose and implement optimized connection solutions for various fields, including mobile devices, wearable devices, medical equipment, and industrial equipment.

More recently, Yokowo developed the Single-Pin Waterproof SPC, a waterproof connector that achieves IPX7-equivalent waterproof performance with a single pin. This product reduces the number of components and saves space, providing greater design flexibility and enabling a wide range of solutions tailored to customers’ product specifications and applications.

In 2024, Yokowo leveraged its manufacturing expertise in ultra-fine probes used in semiconductor inspection fixtures to develop the world’s smallest class spring connector, a micro connector with a diameter of just 0.35 mm. This is thinner than a 0.5 mm mechanical pencil lead and enables multiple connectors to be arranged within limited spaces, supporting the design of smaller, more highly functional electronic devices. Additionally, Yokowo has commercialized its first USB4 connector, a USB4.0-compatible High-speed Transmission 40 Gbps Waterproof Connector using this spring connector. The innovative product combines high-speed transmission with waterproof performance, contributing to greater design flexibility for customers.

Yokowo also developed the two-piece connector (TBC) in the 2000s by applying its leaf spring technology. This connector offers a high degree of flexibility in the mating direction, providing design flexibility according to equipment requirements. Its proprietary floating structure absorbs positional misalignment during mating, enabling stable electrical connections. The two-piece connector also offers excellent resistance to vibration and shock and has been adopted across a wide range of fields, including the overseas POS terminal market, mobile computers, handheld terminals, drones, and industrial equipment such as robots.

In recent years, Yokowo has also developed a compact waterproof two-piece connector. While maintaining resistance to vibration, shock, and water, the product pursues further reductions in size and weight, achieving approximately 20% lower profile than conventional two-piece connectors. This enables use in harsh environments involving rain and significant temperature changes, as well as in a wide range of indoor and outdoor applications. Going forward, Yokowo aims to expand applications beyond mobile devices and develop the product across a variety of markets and industries.

Yokowo’s Fine Connector business has continued to create new value by leveraging the company’s core technologies and strong customization capabilities while addressing customers’ diverse needs. In recent years, the business has also expanded into growth markets such as next-generation communications and IoT, driven by advances in AI technology. The company’s focus on innovation and customer-centric solutions positions it well to support the evolving needs of the electronic device industry.