山本科学工具研究社 Company Profile

"Measure with confidence: Hardness reference plates" - A specialized manufacturer of high-precision hardness reference plates according to ISO and JIS standards.

Yamamoto Scientific Tool Research Co., Ltd. is a specialized manufacturer of high-precision hardness reference specimens compliant with ISO and JIS standards. We handle high-precision hardness reference specimens, microscopic tissue standard specimens, spark test standard specimens, hard nesters, and Charpy impact reference specimens. Since ancient times, humanity has developed soft "iron" for tools and weapons, honing the technology to increase the carbon content in iron to enhance its strength, which has led to the use of various types of metals for a wide range of applications today. The high-precision hardness reference specimens compliant with ISO and JIS for indirect verification of hardness testers are widely used around the world, thanks to Japan's cultivation of hardness uniformity recognized globally and the standard values based on international standards.