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| 1828 | Established as a wholesaler of drugs, dyes and roughs by the 1st Yasubei Konishi in Nihombashi area |
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| 1852 | The 2nd generation Yasubei Konishi succeeded |
| 1873 | Started imports and sales of inorganic chemicals (sulfuric acid · soda ash · sodium bicarbonate) |
| 1880 | Delivered raw materials to the Ministry of Finance National Printing Bureau |
| 1881 | The 3rd generation Yasubei Konishi succeeded |
| 1920 | The 4th generation Yasubei Konishi succeeded |
| 1921 | Reorganized as YASUBEI,KONISHI & CO.,LTD. Kihei Konishi became the 1st President |
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| 1926 | “KONISHI Market Report”, a periodical business report was published |
| 1948 | Kiichiro Konishi assumed office as the 2nd President |
| 1950 | Kiichiro Konishi was inaugurated as the Board Chairman of the Tokyo Dye Industrial Chemicals Association (now Tokyo Chemical Industry Trade Union) |
| 1957 | Osaka Branch Office opened |
| 1965 | Tasuku Konishi assumed office as the 3rd generation President Konishi Building was established (present headquater office) |
| 1971 | Kashima office opened The company changed its name to “Konishiyasu Co., Ltd.” |
| 1975 | Kosuke Konishi assumed office as the 1st Chairman of the National Soda Sales Assocition |
| 1976 | Toshiyuki Konishi assumed office as the 4th generation President |
| 1979 | KONISHIYASU NOGYO SHIZAI Co., Ltd. was established |
| 1996 | Singapore Branch Office opened Kawamura Pharmaceutical Co., Ltd. was merged as a subsidiary company |
| 1998 | Local subsidiary companies were incorporated in Singapore and Malaysia |
| 2001 | Registered: ISO 14001 certification |
| 2002 | Registered: ISO9001 certification |
| 2004 | Shanghai Representative Office opened |
| 2007 | Murakami Chemical Co., Ltd. became a subsidiary company |
| 2008 | Local subsidiary company was incorporated in Shanghai |
| 2013 | Thailand Representative Office opened |
| 2015 | Taiwan Branch Office opened |
| 2018 | Local subsidiary company was incorporated in Thailand |
| 2021 | Takeshi Konishi assumed office as the 5th generation President |
