Matsui Seimitsu . Inc is one of the Japanese  measuring gauge manufacturing companies  with the great tradition and history. The company was established in 1924 in  Sanjyo city, and had made the great innovation by firstly crafting  the wholely hardened Calipers in Japan. Together with the  Square, Mortising gauge, Vernier gauge, and Ruller Matsui Seimitsu's brand name has been well known as the tools with utmost accuracy and toughness.