History
| 1940. 9 | TOA Pharmaceuticals Co., Ltd., established as an affiliate company of Toyama Chemical Co., Ltd. Toshio Nakai appointed as first president. |
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| 1950. 7 | Kentaro Nakai was appointed as president. |
| 1965. 11 | Toyama Nakano plant was completed. |
| 1973. 5 | Artificial tears ophthalmic solutions were developed in collaboration with Sankyo Inc. (currently Daiichi Sankyo Inc.) |
| 1977. 3 | A GMP-compliant factory (Toyama Factory, the first formulation building) was constructed in Sango, Toyama City. |
| 1977. 7 | Headquarters was relocated to Sango, Toyama City. |
| 1979. 3 | Export to southeast Asia was started. |
| 1981. 5 | Business tie-up with Yamanouchi Pharmaceutical Co., Ltd. (currently Astellas Pharma Inc.), was formed. |
| 1987. 7 | Toshiro Nakai was appointed as president. |
| 1994. 4 | Nitto Medic Co., Ltd. is established as an affiliate. |
| 1996. 3 | The 2nd Pharmaceutical Building at the Toyama Plant was constructed. |
| 1997. 4 | Construction of the building for Headquarters was completed in Mizuhashi, Toyama City. |
| 2005. 4 | Development Laboratory was constructed. |
| 2007. 4 | The 1st Pharmaceutical Building of the Nishihongo Plant (DPI formulation only) was completed in Fuchu-machi, Toyama City. |
| 2009. 6 | The 2nd Pharmaceutical Building of the Nishihongo Plant (Solid Formulations Only) was completed. |
| 2009. 10 | Manufacturing and marketing approval for Vancomycin Ophthalmic Ointment 1% was obtained. |
| 2009. 12 | Market launch of Vancomycin Ophthalmic Ointment 1% was conducted. |
| 2018. 11 | Construction of the 4th Pharmaceutical Building at the Toyama Plant was completed. |
| 2020. 05 | Constructed a test management building adjacent to Nishihongo Plant. |
| 2020. 08 | Toshiro Nakai was appointed as Chairman and Jun Nakai was appointed as president. |