Nagao & Co., Ltd

Our company was founded in 1931 as a manufacturer of Na₂S. Today, we produce high-quality inorganic sulfides such as Na₂S, NaSH, and Na₂S₄. We hold approximately 70% of the domestic market share for NaSH and are the only manufacturer of Na₂S and Na₂S₄ in Japan. As a producer of high-quality products, we also manufacture their anhydrous forms. These anhydrous sulfides are used as sulfur sources in applications such as lens monomers, sodium-ion batteries, silane coupling agents, and the introduction of sulfide and thiol groups into organic compounds.