| 1937-02 |
Founded Nishikawa Shokai in Kanda Ogawa-cho, Chiyoda-ku, Tokyo, and began selling paint. |
| 1948-05 |
Changed company name to Nishikawa Shokai Co., Ltd. Moved headquarters to Kanda Tomiyama-cho, Chiyoda-ku, Tokyo, with capital of 1 million yen. |
| 1949-10 |
Shimamura factory completed in Funato, Itabashi-ku, Tokyo. |
| 1950-05 |
Changed company name to Atom Chemical Paint Co., Ltd. |
| 1954-10 |
Obtained approval as a JIS-marking authorized factory. |
| 1962-04 |
Received the Tokyo Governor's Award (Enterprise Rationalization). |
| 1965-01 |
Designated as a Small and Medium Enterprise Rationalization Model Factory. |
| 1969-06 |
Moved headquarters from Kanda Tomiyama-cho, Chiyoda-ku, Tokyo to Funato, Itabashi-ku, Tokyo. |
| 1969-11 |
Entered a technology partnership with Baltimore Paint Co., USA, regarding road paint. |
| 1971-02 |
Developed the world's first heatline marker, a welding spray-type lane marking machine, and received a Ministry of Economy, Trade and Industry technology development grant for the technology. |
| 1971-11 |
Completed the Saitama factory (now the Kasu plant) in Kasu City, Saitama Prefecture. |
| 1976-02 |
Received the Small and Medium Enterprise Research Center Award (now the Good Company Award) and national recognition. |
| 1977-12 |
The Kuki factory was completed in Shōbu Town, Minami-Saitama District, Saitama Prefecture (now Shōbu Town, Kuki City). |
| 1977-12 |
Completed the Kuki plant in Shōbu Town, Minamisaitama District, Saitama Prefecture (now Kuki City Shōbu Town) |
| 1981-01 |
The flooring materials division was established. Fully entered the factory floor coating market. |
| 1984-04 |
Received the Ichimura Prize for developing low-temperature melt-type road marking paint in a melt bag. |
| 1985-04 |
Received the Minister of Science and Technology Award for achievements in developing low-temperature melt-type road marking paint in a melt bag. |
| 1985-05 |
Founder Katsunobu Nishikawa received the Order of the Rising Sun, Gold Rays with Neck Ribbon (5th class). |
| 1986-01 |
Signed a technology agreement with U.S. Mameko International Inc. regarding heavy-duty floor materials. |
| 1988-02 |
Commenced technology transfer of road paint to Thai company Hiup Hon Co., Ltd. |
| 1988-06 |
Capital increased to 1.04 billion yen. Listed as a publicly traded stock (Tokyo). |
| 1994-03 |
The Okayama factory was completed in Nagi Town, Kaita District, Okayama Prefecture. |
| 1994-04 |
Company name changed to Atomics Co., Ltd. |
| 1997-03 |
Established T.S.C. (Technical Service Center). |
| 1998-10 |
ISO 9002 obtained at the Okayama factory and related departments. |
| 2000-11 |
ISO 9001 obtained by the Road Division. |
| 2001-01 |
Established a local subsidiary in China: "Atom (Langfang) Coatings Ltd." |
| 2001-10 |
Integrated the Household Division (Atom House Paint) into Atom Support. |
| 2001-11 |
ISO 14001 obtained by the Paint Division (Kasu Factory). |
| 2003-10 |
Established a local subsidiary in China: "Atom (Wuxi) Coatings Ltd." |
| 2004-12 |
ISO 14001 obtained by the Road Division (Kuki Factory & Okayama Factory). |
| 2004-12 |
Listed on the JASDAQ Stock Exchange (now Osaka Stock Exchange). |
| 2005-11 |
Received the Tokyo Governor's Award for the inorganic-organic hybrid coating material "Atom Compobright". |
| 2007-07 |
ISO 9001 certification obtained by the Paint Division |
| 2008-10 |
New hazardous materials warehouse completed at the Kazo plant |
| 2010-04 |
Participated in the "Saitama Prefecture Hatoyama District Mid-Mountain Conservation Project" as part of CSR activities |
| 2012-05 |
Liquidated the company "Ardmo (Langfang) Paint Co., Ltd." |
| 2013-07 |
Following the integration of the Osaka Stock Exchange's physical market into the Tokyo Stock Exchange, the company listed its shares on the Tokyo Stock Exchange JASDAQ Standard |
| 2014-12 |
Completed a new technology research institute within the Kazo plant, consolidating researchers |
| 2017-06 |
Liquidated the company "Ardmo (Wuxi) Paint Co., Ltd." |
| 2018-04 |
Established the Raise Division |
| 2020-04 |
Established the Business Headquarters and Management Promotion Headquarters |
| 2022-04 |
Transitioned from the JASDAQ Standard market to the Standard market following a change in the Tokyo Stock Exchange market classification |
