"Success starts with Showa" High quality electronic circuits and components start with high quality jumper and lead wires made in Japan. Even if your company tries to manufacture high quality electronic circuits and electronic components, your products will not be good if the quality of the jumpers and leads you use is low. At SHOWA SEISEN CO., LTD. , first the quality of our materials management - such as purity and mixture ratios - for our jumpers and leads is extremely high. We also ...