Corporate History

Company OverviewCorporate History
Jun.1917 Established "Konoshima Sulfuric Acid Manufacturing Factory" in Okayama, Japan. (Later renamed Konoshima Artificial Fertilizer Co.)
Mar.1946
Konoshima Chemical Co., Ltd. was established by merger of Konoshima Artificial Fertilizer Co. and (former) Konoshima Chemical Co., Ltd.
Oct.1949 Started manufacture of magnesium carbonate.
Mar.1957 Started manufacture of magnesium oxide.
Dec.1960 Started manufacture of calcium silicate heat insulation material.
Nov.1961 Started manufacture of calcium carbonate.
Apr.1972 Started manufacture of nonflammable building materials: calcium silicate boards.
Nov.1976 Started manufacture of nonflammable building materials: calcium silicate exterior wall materials.
Nov.1977 Increased capital to 360 million JPY.
Oct.1981 Started manufacture of high-purity magnesium oxide.
Jun.1984 Started manufacture of calcium silicate exterior materials by new method (extrusion method).
Feb.1988 Started manufacture of nonflammable fittings (exterior wall siding materials).
Dec.1989 Succeeded in synthesizing YAG ceramics by joint research with National Institute for Research in Inorganic Materials, Science and Technology Agency, and stared production.
Dec.1996 Listed stock on The Osaka Securities Exchange Second Section. Increased capital to 1,320 million JPY.
Jul.1998 Started manufacture of EB coated hard type calcium silicate board.
(EB : Electron-beam hardened paint)
Jan.2003 Awarded the "Photonics Circle of Excellent Award" from the Photonics Spectra Magazine.
Jul.2003 ISO9001 Certified.
Apr.2005 Awarded the "Corporate Technical Achievement Award" from the American Ceramics Society.
Jan.2006 Awarded the "Ashihara Science Award" from the Kagawa Industrial Support Foundation.
Mar.2006 Constructed pre-cut mill for housing materials.
Jun.2006 Constructed manufacturing facility for non-halogen flame retardant.
Jul.2011 ISO14001 Certified.
Jul.2013 Altered to Tokyo Stock Exchange, Inc. Second Section.