Daiso Engineering Co., Ltd.

Michiyori Kado, who later became the first chief engineer of Osaka Soda Co., Ltd., established Japan's first industrial continuous manufacturing method for salt electrolysis technology (later known as "Oosou-style mercury electrolysis soda manufacturing method").

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")

Established in Osaka City for the purpose of manufacturing and selling caustic soda and downstream products, named "Osaka Soda Co., Ltd."

Osaka Soda was established in Osaka with the objective of manufacturing and selling caustic soda and its related products.

Operation started at Osaka Soda Co., Ltd.'s Kokura factory (Kitakyushu City, Fukuoka Prefecture).

The operations began at Osaka Soda's Kokura Electrolysis Plant in the city of Kita-Kyushu, Fukuoka Prefecture, Japan.

Operation started at Osaka Soda Co., Ltd.'s Amagasaki factory (Amagasaki City, Hyogo Prefecture).

The operations began at Osaka Soda's Amagasaki Electrolysis Plant in the city of Amagasaki, Hyogo Prefecture, Japan.

Operation started at Osaka Soda Co., Ltd.'s Matsuyama factory (Matsuyama City, Ehime Prefecture).

The operations began at Osaka Soda's Matsuyama Electrolysis Plant in the city of Matsuyama, Ehime Prefecture, Japan.

Osaka Soda Co., Ltd.'s mercury removal technology (MR system) received the "Technical Award" from the Japan Soda Industry Association.

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.

Osaka Soda Co., Ltd. invested 50% in Okayama Kasei Co., Ltd., and the Mizushima factory (Kurashiki City, Okayama Prefecture) started operation.

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.

Established in Osaka City to sell in-house and external products utilizing nearly 60 years of electrolytic and other organic chemical technologies cultivated by Osaka Soda Co., Ltd., "Daiso Engineering Co., Ltd." (wholly owned subsidiary of Osaka Soda Co., Ltd.).

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.

Daiso Engineering Co., Ltd. absorbed Oosou Construction Co., Ltd.

Daiso Engineering absorbed Daiso Koji Co., Ltd., a wholly owned construction company of Osaka Soda, for expanded engineering operations.

Osaka Soda Co., Ltd. completed the transition of all electrolytic factory manufacturing processes from mercury method to ion exchange membrane method.

All of Osaka Soda's electrolysis plants were prepared for conversion from mercury-type electrolysis to ion-exchange membrane processing.

Osaka Soda Co., Ltd. changed its company name to "Daiso Co., Ltd."

The name of Osaka Soda was changed to Daiso Co., Ltd. ("Daiso").

Daiso Co., Ltd. started manufacturing and sales of electrodes for caustic soda equipment.

Daiso began manufacturing and selling electrodes for salt electrolysis plants to third parties.

Daiso Co., Ltd.'s development of high-durability anodes for electro-galvanizing was awarded the "Chemical Technology Award" by the Chemical Society of Japan.

The Chemical Technology Prize was awarded to Daiso by the Chemical Society of Japan for its development of high-durability anodes for electrogalvanizing.

Established "JMR Corporation" (wholly owned subsidiary of Daiso Engineering Co., Ltd.) for the purpose of recycling used fluorescent lamps.

JMR Co., Ltd. was established by Daiso Engineering as its wholly owned subsidiary with the objective of recycling waste fluorescent lamps.

Daiso Co., Ltd. transferred the metal electrode business and the trademark "SPLODE" from TDK Co., Ltd.

Daiso took over the metal electrode business from TDK Corporation.

For the purpose of further electrode technology development, improvement of manufacturing technology, expansion of sales to third parties, and promotion of electrolytic cell peripheral equipment, Daiso Engineering Co., Ltd. transferred the electrolytic business from Daiso Co., Ltd.

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.

Daiso Engineering Co., Ltd. began participating in the Bolivia Lithium Recovery Technology Development Support, a project implemented by the Ministry of Economy, Trade and Industry.

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.

A high-efficiency bipolar electrolytic cell was introduced at Daiso Co., Ltd. Matsuyama Factory, and the demonstration evaluation of electrodes using the latest commercial equipment began.

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.

At the Minamata Diplomatic Conference on Mercury, Daiso Engineering Co., Ltd.'s mercury removal technology was introduced to the world.

Daiso Engineering presented its mercury-removal technology at the Minamata Convention on Mercury held in Minamata, Kyushuu Island, Japan.

Daiso Co., Ltd. changed its name to "Osaka Soda Co., Ltd." (hereinafter referred to as "Osaka Soda").

The name of Daiso was changed to Osaka Soda Co., Ltd.("Osaka Soda").