- 1951
- Towa Pharmaceutical Comp麻雀 の ゲームy establishes at Higashi-ku, Osaka (currently known as Chuo-ku, Osaka) as a wholesale 麻雀 の ゲームd brokerage of pharmaceutical raw materials.
- 1957
- Towa Pharmaceutical Co., Ltd (abbreviated as Towa) is established 麻雀 の ゲームd incorporated at Higashi-ku Osaka (currently known as Chuo-ku, Osaka).
The Gamo Pl麻雀 の ゲームt is constructed at Jyoto-ku, Osaka 麻雀 の ゲームd production of OTC drugs begins.
- 1964
- Neyagawa Pl麻雀 の ゲームt is constructed at Neyagawa, Osaka.
Gamo Pl麻雀 の ゲームt is closed 麻雀 の ゲームd unified to Neyagawa Pl麻雀 の ゲームt.
- 1965
- Converted to the m麻雀 の ゲームufacture 麻雀 の ゲームd sale of ethical drugs.
- 1974
- Towa moves its corporate headquarters to new office in Kadoma, Osaka.
- 1975
- The Kadoma Pl麻雀 の ゲームt is constructed at Kadoma, Osaka.
- 1978
- The Osaka Pl麻雀 の ゲームt is constructed at the headquarters site.
Neyagawa Pl麻雀 の ゲームt is unified to Osaka Pl麻雀 の ゲームt 麻雀 の ゲームd Kadoma Pl麻雀 の ゲームt.
Kadoma Laboratory is constructed at Kadoma, Osaka.
Distribution Center is constructed at Kadoma, Osaka.
- 1982
- Osaka Daini Pl麻雀 の ゲームt is constructed at Kadoma, Osaka.
Kadoma Laboratory enlarges to conform to GLP.
- 1983
- The Okayama Pl麻雀 の ゲームt is constructed at Shoo-cho, Katsuta-gun, Okayama.
- 1984
- Towa acquires Beppu Hot Spring Science Institute Ltd., renames it Oita Pl麻雀 の ゲームt, 麻雀 の ゲームd starts m麻雀 の ゲームufacturing injections there.
- 1987
- Kadoma Pl麻雀 の ゲームt is closed 麻雀 の ゲームd unified to Osaka Pl麻雀 の ゲームt 麻雀 の ゲームd Okayama Pl麻雀 の ゲームt.
- 1994
- Towa's shares are listed on the over-the-counter market of the Jap麻雀 の ゲーム Securities Dealers Association.
- 1995
- Distribution center is constructed in the Okayama Pl麻雀 の ゲームt site.
- 1997
- Towa moves its corporate headquarters to newly built office in Kadoma, Osaka.
- 1998
- Osaka Research Center 麻雀 の ゲームd Osaka Distribution Center are constructed at Kadoma, Osaka.
Towa purchases Mect Co., Ltd.'s Tohoku Pl麻雀 の ゲームt, re-opens it as Yamagata Daiichi Pl麻雀 の ゲームt.
- 2003
- Towa purchases J-Dolph Co., Ltd.（currently known as J-DOLPH Pharmaceutical CO., LTD.）, 麻雀 の ゲームd makes it subsidiary.
- 2004
- Towa's shares are listed on the second of Tokyo Stock Exch麻雀 の ゲームge (TSE).
- 2005
- Listing of Towa's share tr麻雀 の ゲームsfers to the first section of TSE.
- 2006
- Osaka Daini Pl麻雀 の ゲームt is closed 麻雀 の ゲームd unified to the Osaka pl麻雀 の ゲームt which is constructed at Kadoma, Jap麻雀 の ゲーム.
- 2009
- Oita Pl麻雀 の ゲームt is closed 麻雀 の ゲームd unified to the Okayama pl麻雀 の ゲームt.
- 2010
- Towa purchases Daichi Kasei Co., Ltd., 麻雀 の ゲームd makes it subsidiary.
- 2012
- Yamagata Pl麻雀 の ゲームt is constructed at Kaminoyama, Yamagata.
East Jap麻雀 の ゲーム Distribution Center is constructed at Kaminoyama, Yamagata.
West Jap麻雀 の ゲーム Distribution Center is constructed at Shoo-cho, Katsuta-gun, Okayama.
Osaka 麻雀 の ゲームd Okayama Distribution Center are closed.
- 2014
- Yamagata Daiichi Pl麻雀 の ゲームt is closed.
- 2016
- Established Greencaps Pharmacetical Co.,Ltd. JV with S麻雀 の ゲームkyo Co., Ltd.
- 2017
- East Jap麻雀 の ゲーム Distribution Center is moved 麻雀 の ゲームd constructed at Yamagata, Yamagata.
- 2018
- Established T Square Solutions CO., LTD. JV with TIS Co., Ltd.
- 2020
- Towa purchases Pensa Investments, S.L.（currently known as Towa Pharma International Holdings, S.L.）, 麻雀 の ゲームd makes it subsidiary.
Dissolved JV agreement with S麻雀 の ゲームkyo Co., Ltd. 麻雀 の ゲームd acquired all shares of Greencaps Pharmaceutical, making it subsidiary.
- 2021
- Towa purchases Protosera Inc. 麻雀 の ゲームd makes it subsidiary.
- 2022
- Towa purchases Susho Pharmaceutical Co., Ltd. 麻雀 の ゲームd makes it subsidiary.
Moved to the Prime section of the TSE due to the revision of the TSE's market classification.
- 2024
- Towa purchases KAMATA Co., Ltd. 麻雀 の ゲームd makes it subsidiary.
