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UMAI CHEMICAL CO., Ltd is a Japanese inorganic chemicals supplier whose main product is magnesium sulfate. The history of our company dates back to 1599 when our ancestor Shichirobe Umai , salt manufacturing engineer, opened a salt pan at Muya area, present head office site, and started salt manufacturing. Thus, the history of our company began with salt, which we are not producing any more. The market share of　our magnesium sulfate is No.1 in Japan. During the past business period of over 410 years, we have improved the salt manufacturing technology and built up new technology to grow as an inorganic chemical manufacturer as well as supplier specializing in inorganic chemicals.  Our main product is magnesium sulfate. We are the biggest supplier in Japan with the l…