| 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. Capital 1.5 million yen |
| Oct.1949 |
Started manufacturing of magnesium carbonate. |
| Mar.1957 |
Started manufacturing of magnesium oxide. |
| Dec.1960 |
Started manufacturing products using calcium silicate. |
| Nov.1961 |
Started manufacturing of calcium carbonate. |
| Apr.1972 |
Started manufacturing of non-combustible building materials: calcium silicate boards. |
| Nov.1976 |
Started manufacturing of non-combustible building materials: calcium silicate exterior wall materials. |
| Nov.1977 |
Increased capital to 360 million JPY. |
| Oct.1981 |
Started manufacturing of high-purity magnesium oxide. |
| Jun.1984 |
Started manufacturing of calcium silicate exterior materials by new method (extrusion method). |
| Feb.1988 |
Started manufacturing of non-combustible 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 of production. |
| Dec.1996 |
Listed stock on The Osaka Securities Exchange Second Section. Increased capital to 1,320 million JPY. |
| Jul.1998 |
Start to 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 exterior 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. |
| May 2015 |
Started LAMBDA business after receiving business transfer from Showa Denko building materials Co.,Ltd. |
| Oct.2015 |
Received 2015 GOOD DESIGN AWARD (Eaves ceiling material, construction material)
|
| Nov.2016 |
Received the letter of thanks from JAXA (cold storage material GLF contributes to X-ray astronomical satellite Hitomi) |
| Jan.2017 |
Started manufacturing of synthetic magnesite (MAGTHERMO), synthetic bematite (ALCUBE) |
| May 2018 |
Completion of 100th anniversary technology building |
| Oct.2018 |
Received 2018 GOOD DESIGN AWARD (high-performance sound floor of the highest level of wooden construction) |
| Oct.2020 |
Received 2020 GOOD DESIGN AWARD (construction method using high-design eaves lumber and special metal fittings) |
| Apr.2022 |
Altered to Tokyo Stock Exchange, Inc. Standard. Market. |
| Jul.2024 |
Received the letter of thanks from JAXA (cold storage material GLF contributes to X-ray imaging and spectroscopy mission XRISM) |
| Oct.2024 |
Received 2024 GOOD DESIGN BEST100
(KONOSHIMA CO2 RECYCLE PRODUCTION SYSTEM) |
