| 1917 |
Founded as Kamijima Sulfuric Acid Plant in Kamijima, Kasaoka City, Okayama Prefecture, and changed the company name to Kamijima Artificial Fertilizer Co., Ltd., starting as a chemical fertilizer company. |
| 1917-06 |
Established Kamisima Sulfuric Acid Plant in Kamisima, Okayama Prefecture (later Kamisima Artificial Fertilizer Co., Ltd.) |
| 1946 |
Established as Kamijima Chemical Industry Co., Ltd. through merger with the former Kamijima Chemical Industry Co., Ltd., and continues to this day. |
| 1946-03 |
Merged Kamisima Artificial Fertilizer Co., Ltd. and (former) Kamisima Chemical Industries Co., Ltd.: Established Kamisima Chemical Industries Co., Ltd. Capital: 1.5 million yen |
| 1949-10 |
Started manufacturing magnesium carbonate |
| 1957-03 |
Started manufacturing magnesium oxide |
| 1960-12 |
Started manufacturing products utilizing calcium silicate |
| 1961-11 |
Started manufacturing calcium carbonate |
| 1972-04 |
Started manufacturing non-combustible building materials calcium silicate laminated boards |
| 1976-11 |
Started manufacturing non-combustible building materials calcium silicate exterior wall materials |
| 1977-11 |
Capital increased to 360 million yen |
| 1981-10 |
Started manufacturing high-purity magnesium oxide |
| 1984-06 |
Started manufacturing calcium silicate exterior materials using new extrusion method |
| 1988-02 |
Started manufacturing non-combustible fixtures (exterior wall construction materials) |
| 1989-12 |
Succeeded in synthesizing YAG ceramics through joint research with the Institute of Inorganic Materials, Science and Technology Agency, and began commercialization |
| 1996-12 |
Listed on the Second Section of the Osaka Securities Exchange. Capital increased to 1.32 billion yen |
| 1998-07 |
Started manufacturing hard calcium silicate decorative boards with electronic coating (EB board) |
| 2003-01 |
Received the "Photonics Circle of Excellence Award" from Laurin Publishing Company, Inc. |
| 2003-07 |
Obtained ISO9001 certification |
| 2005-05 |
The American Ceramics Society received the "Corporate Technical Achievement Award" |
| 2006-01 |
Awarded the "Ashihara Science Award" by the Kagawa Industry Support Foundation |
| 2006-03 |
Construction of exterior material precutting factory |
| 2006-06 |
Construction of non-halogen flame retardant manufacturing equipment |
| 2011-07 |
ISO 14001 certification |
| 2013-07 |
Changed market to Tokyo Stock Exchange Second Section |
| 2015-05 |
Received business transfer from Showa Denko Building Materials Co., Ltd. and started Lambda business |
| 2015-10 |
Received Good Design Award for 2015: (Eaves material "Laforet Timber", Custom-made material "Laforet Grace") |
| 2016-11 |
Received a letter of appreciation from JAXA (contribution of cryogenic materials GLF to X-ray astronomy satellite "Hitomi") |
| 2017-01 |
Started manufacturing synthetic magnesite (MagSaro), synthetic bauxite (Alcub) |
| 2018-05 |
Completion of 100th Anniversary Technical Building |
| 2018-10 |
Received Good Design Award for 2018 (High-performance soundproof floor for wooden architecture) |
| 2020-10 |
Received Good Design Award for 2020 (High-design eaves ceiling material "Altezart" and installation method "Atrafit" with dedicated fittings) |
| 2022-04 |
Changed market to Tokyo Stock Exchange Standard Market |
| 2024-07 |
Received a letter of appreciation from JAXA (contribution of cryogenic materials GLF to X-ray spectroscopy satellite "XRISM") |
| 2024-10 |
Selected for Good Design Best 100 for 2024 (KONOSHIMA CO2 RECYCLE PRODUCTION SYSTEM) |
