Konoshima Chemical Co.,Ltd. manufactures and sells building materials, chemicals, and ceramics. The company offers residential and non-residential ceramic siding, eaves, gable boards, and refractory panels; and non-combustible building materials for residential and non-residential buildings. It also provides chemicals, such as magnesium oxide, flame retardant magnesium hydroxide, and magnesium carbonate; and functional ceramics. The company was founded in 1917 and is headquartered in Osaka, Japan.