Three S Corporation is Japan's only dedicated manufacturer of valve positioners, essential for plant operations. The origins of our company name, "Three S's" (Safety, Speed, Service), represent customer safety and security through consistent quality, fast delivery and swift response, and high-quality service, including on-site response and after-sales support. Plants, which produce energy and materials essential to people's lives every day, are dangerous environments. Three S will continue to strive to perfect the "Three S's" so that plant workers can work safely and securely. While valve positioners may not be the most popular product, we are proud to be the "unsung hero" supporting plants around the world.