| 1913 |
後に大阪曹達（株）の初代技師長となる門多道別氏が、日本で初めて食塩電解の工業的連続製造法の技術（後の"大曹式水銀法電解ソーダ製法"）を確立。 |
| 1913 |
The first continuous-production-type salt electrolysis technology was developed by Mr. Chiwaki Kadota of Japan, who later became the first technical director of Osaka Soda Co., Ltd. ("Osaka Soda"), the former name of Daiso Co., Ltd. ("Daiso's Mercury-Based Soda Electrolysis Process") |
| 1915 |
かせいソーダ及びその下流製品の製造・販売を目的として、大阪市に「大阪曹達株式会社（以下「大阪曹達（株）」）」を設立。 |
| 1915 |
Osaka Soda was established in Osaka with the objective of manufacturing and selling caustic soda and its related products. |
| 1917 |
大阪曹達（株）小倉工場(福岡県北九州市)操業開始｡ |
| 1917 |
The operations began at Osaka Soda's Kokura Electrolysis Plant in the city of Kita-Kyushu, Fukuoka Prefecture, Japan. |
| 1931 |
大阪曹達（株）尼崎工場(兵庫県尼崎市)操業開始｡ |
| 1931 |
The operations began at Osaka Soda's Amagasaki Electrolysis Plant in the city of Amagasaki, Hyogo Prefecture, Japan. |
| 1952 |
大阪曹達（株）松山工場(愛媛県松山市)操業開始｡ |
| 1952 |
The operations began at Osaka Soda's Matsuyama Electrolysis Plant in the city of Matsuyama, Ehime Prefecture, Japan. |
| 1969 |
大阪曹達（株）の水銀除去技術（MRシステム）が、日本ソーダ工業会「技術賞」を受賞。 |
| 1969 |
The Technology Prize was awarded to Osaka Soda for its mercury removal technology, later known as the MR System, by the Japan Soda Industry Association. |
| 1970 |
大阪曹達（株）が50%出資する岡山化成（株）水島工場（岡山県倉敷市）操業開始。 |
| 1970 |
Okayama Chemical Co., Ltd. was established by Osaka Soda jointly with a third party (on a 50–50% basis), and the operations began at its Mizushima Electrolysis Plant in the city of Kurashiki, Okayama Prefecture in Japan. |
| 1975 |
大阪曹達（株）の60年近い歴史の中で培った電解、その他有機化学技術を、商品として社内外に販売することを目的として、大阪市に「ダイソーエンジニアリング株式会社（大阪曹達（株）100%出資）（以下「ダイソーエンジニアリング（株）」）」を設立。 |
| 1975 |
Daiso Engineering Co., Ltd. ("Daiso Engineering") was established by Osaka Soda in Osaka City as its wholly owned subsidiary, Daiso Engineering, with the objective of selling to Osaka Soda and its group companies, as well as other third parties, the electrolysis and organic chemical technologies developed and acquired by Osaka Soda through its 60-year history of electrolysis plant operations. |
| 1978 |
ダイソーエンジニアリング（株）が、大曹工事（株）を吸収合併。 |
| 1978 |
Daiso Engineering absorbed Daiso Koji Co., Ltd., a wholly owned construction company of Osaka Soda, for expanded engineering operations. |
| 1986 |
大阪曹達（株）全電解工場の製造プロセスを水銀法からイオン交換膜法に製法転換完了。 |
| 1986 |
All of Osaka Soda's electrolysis plants were prepared for conversion from mercury-type electrolysis to ion-exchange membrane processing. |
| 1988 |
大阪曹達（株）が「ダイソー株式会社（以下「ダイソー（株）」）」に社名変更。 |
| 1988 |
The name of Osaka Soda was changed to Daiso Co., Ltd.("Daiso"). |
| 1994 |
ダイソー（株）にて、かせいソーダ装置向け電極の製造・販売を開始。 |
| 1994 |
Daiso began manufacturing and selling electrodes for salt electrolysis plants to third parties. |
| 1999 |
ダイソー（株）の電気亜鉛めっき用高耐久性アノードの開発が、日本化学会「化学技術賞」を受賞。 |
| 1999 |
The Chemical Technology Prize was awarded to Daiso from the Chemical Society of Japan for its development of high-durability anodes for electrogalvanizing. |
| 2001 |
使用済み蛍光管のリサイクル事業を目的として、「株式会社ジェイ・エム・アール（ダイソーエンジニアリング（株）100%出資）」を設立 |
| 2001 |
JMR Co., Ltd. was established by Daiso Engineering as its wholly owned subsidiary with the objective of recycling waste fluorescent lamps. |
| 2002 |
ダイソー（株）が、TDK（株）より金属電極事業および商標「SPLODE」を譲受。 |
| 2002 |
Daiso took over the metal electrode business from TDK Corporation. |
| 2008 |
更なる電極の技術開発、製造技術の向上、第三者への販売拡充と電解槽周辺装置の拡販を目的として、ダイソーエンジニアリング（株）が、ダイソー（株）より電解事業を譲受。 |
| 2008 |
All of Daiso's electrolysis business interests were transferred to Daiso Engineering from Daiso, for consolidation by Daiso Engineering, based technical developments and improvement of the electrodes and also for expansion of the electrolysis business and other associated systems. |
| 2011 |
ダイソーエンジニアリング（株）が、経済産業省実施の「貿易投資円滑化支援事業」であるボリビアリチウム回収技術開発支援に参画開始。 |
| 2011 |
Daiso Engineering participated in the technical development and assistance of lithium recovery technologies for Bolivia, one of the trade investment support projects sponsored by the Ministry of Economy, Trade and Industry, Japan. |
| 2012 |
ダイソー（株）松山工場に高効率複極式電解槽を導入し、最新商業設備による電極実証評価開始。 |
| 2012 |
A high-efficiency bipolar electrolyzer was introduced by Daiso Engineering at Daiso's Matsuyama electrolysis plant for evaluation of various electrodes applied to the latest commercial operation plant. |
| 2013 |
水銀に関する水俣条約外交会議において、ダイソーエンジニアリング（株）の水銀除去技術を世界へ紹介。 |
| 2013 |
Daiso Engineering presented its mercury-removal technology at the Minamata Convention on Mercury held in Minamata, Kyushuu Island, Japan. |
| 2015 |
ダイソー株式会社が「株式会社大阪ソーダ（以下「（株）大阪ソーダ」）」に社名変更。 |
| 2015 |
The name of Daiso was changed to Osaka Soda Co., Ltd.("Osaka Soda"). |
