| 1935 |
Established the Kawaguchi Chemical Research Institute (now Kawaguchi Factory) in Kawaguchi City, Saitama Prefecture. |
| 1935-12 |
Established Kawaguchi Chemical Laboratory (now Kawaguchi Factory). |
| 1936 |
Commenced production of sodium sulfite and sodium sulfite salts, and began manufacturing photographic chemicals 'Hydroquinone' and 'Metol'. |
| 1937 |
Reorganized into Kawaguchi Chemical Industries Co., Ltd. (capital 300,000 yen). |
| 1937-01 |
Reorganized into Kawaguchi Chemical Industry Co., Ltd. and opened Head Office at Nihonbashi Muromachi, Chuo-ku, Tokyo. |
| 1937-01-11 |
Established: January 11, 1937 |
| 1945 |
Commenced manufacturing of dye and pigment intermediates. |
| 1951 |
Relocated headquarters to Chiyoda-ku, Tokyo. |
| 1951-08 |
Relocated head office to Kandata-cho, Chiyoda Ward, Tokyo. |
| 1954 |
Obtained JIS labeling approval for photographic chemicals and rubber chemicals. |
| 1954-03 |
Obtained permission for JIS Mark on photo and rubber chemicals. |
| 1955 |
Commenced production of rubber chemical vulcanization agent 'Actor Q'. |
| 1958 |
Opened Osaka branch office and began manufacturing solvent agents. |
| 1958-07 |
Established Osaka Office. |
| 1961 |
Listed on the Second Section of the Tokyo Stock Exchange, capital increase (capital 128 million yen). |
| 1961-01 |
Listed on the second section market of Tokyo Stock Exchange. |
| 1962 |
Received the Ministry of International Trade and Industry Director General Award as an excellent factory for industrial standardization and quality management. |
| 1962-11 |
Was awarded by the Chief of Regional Bureaus of International Trade and Industry as one of the best factories for industrial standards and quality control. |
| 1964 |
Capital increase (capital 200 million yen). |
| 1965 |
Commenced production of resin anti-oxidants. |
| 1970-05 |
Relocated head office to Soto-Kanda, Chiyoda Ward, Tokyo. |
| 1972 |
Commenced production of rubber processing aid 'Extron K-1'. |
| 1974 |
Capital increase (capital of 300 million yen). |
| 1975 |
Received the Minister of Economy, Trade and Industry Award as an excellent thermal management plant. |
| 1975-07 |
Upgraded Osaka Office to Osaka Branch. |
| 1975-11 |
Was awarded by the Minister of International Trade and Industry as one of the best factories for energy control. |
| 1976 |
Moved headquarters to Chiyoda-ku, Tokyo (current location). |
| 1976-04 |
Relocated head office to Uchi-Kanda. |
| 1977 |
Established the Kashima plant in Hasaki Town, Ibaraki Prefecture (now Koshimizu City) and increased capital (capital of 610 million yen). |
| 1977-02 |
Established Kashima Factory in Ibaraki Prefecture. |
| 1982 |
Commenced production of pharmaceutical intermediates. |
| 1984 |
Entered into a sales partnership for rubber chemicals with RT Bandebilt Co., USA. |
| 1984-09 |
Established distributorship with R.T. Vanderbilt (USA) for rubber chemicals. |
| 1987 |
Held a 50th anniversary celebration ceremony. |
| 1987-01 |
Held a celebration marking the 50th anniversary of the Company’s foundation. |
| 1990 |
Commenced production of pesticide intermediates. |
| 1993 |
Moved headquarters office to Kawaguchi City. |
| 1993-03 |
Relocated head office business office to Kawaguchi City, Saitama Prefecture. |
| 1994 |
Entered into a sales partnership for rubber chemicals with Bayer AG (Germany) (now LanzaTech). |
| 1994-06 |
Osaka Branch renamed Osaka Sales Office. |
| 1994-09 |
Established distributorship with Bayer (Germany) for rubber chemicals. |
| 1997 |
Obtained ISO 9001 certification. |
| 1997-11 |
ISO 9001 accreditation. |
| 1998 |
Entered the contract synthesis business. |
| 2001 |
Commenced production of pharmaceutical reagents. |
| 2002 |
Closed the Kashima plant. |
| 2006 |
Obtained ISO 14001 certification. |
| 2006-01 |
ISO 14001 accreditation. |
| 2008 |
Opened a Shanghai office. |
| 2008-06 |
Established Shanghai Office. |
| 2010 |
Established Kaikei Ai (Shanghai) Trading Co., Ltd. |
| 2010-08 |
Established Kawaguchi Chemical Industry (Shanghai) Trading Co., Ltd. |
| 2018 |
Completed the new Research & Development Department (new lab building) and finished construction of the new 29th plant. |
| 2019 |
Relocated Osaka Sales Office to the same district |
| 2022 |
Changed to the Standard Market due to the Tokyo Stock Exchange market reorganization |
| 2024 |
Listed on the Main Market of the Nagoya Stock Exchange |
