Professor Akihiko Chiba of Tohoku University developed COBARION in the mid-1990s, when he began researching the domestic production of cobalt-chromium-molybdenum alloys as a medical metal. The main objective was to eliminate nickel from the alloy, which was already a problem in Europe at the time and caused allergic reactions. At the same time, the alloy needed to be easy to process and durable enough to be used for medical prostheses, which was the main application of the alloy. In order to solve these problems, Mr. Chiba continued to study the structure of the material, and discovered the importance of nitrogen in the process. The addition of nitrogen, which was previously thought to be an impurity in the alloy, resulted in high hardness and excellent scratch resistance, and also made the alloy easier to process at high temperatures. Moreover, when the surface was polished, it was found to have a brilliance comparable to that of precious metals.