The founder Tokichi OKUNO established OKUNO Toh Shoten and dealt in industrial chemicals.
Seiroku OKUNO took over the organization and changed OKUNOsei Shoten to become a wholesaler.
Became the first company in Japan to successfully manufacture baking powder
Constructed a plant at Joto-ku, Osaka, and started manufacturing and sales of industrial chemicals.
Incorporated OKUNOsei Shoten & Co., Ltd. from a private organization.
Constructed Plant No.1.
Incorporated and reorganized into OKUNO Chemical Industries Co., Ltd. with the capital of JPY 600,000
Started selling colors for ceramic wares
Started manufacturing and selling fatty buffing compounds
Started manufacturing and sales of glass enamels for firing
Increased capital to JPY 1,500,000.
Opened Tokyo Branch.
Start manufacturing,, selling brighteners and related products for plating
Increased capital to JPY 30,000,000
Developed emulsifiers for cake, and started manufacturing and selling
Developed improves for noodles, started manufacturing and selling
Developed low melting point glass, started manufacturing and selling
Increased capital to JPY 50,000,000
Established joint venture company OKUNO ENGINEERING (H.K.) LTD. in Hong Kong
Increased capital to JPY 70,000,000
Moved head office to its present location
Opened R&D center for Inorganic Materials Dept.
Opened R&D center for Metal Finishing Dept.
Increased owned capital at OKUNO ENGINEERING (H.K.) LTD. to 100%
Opened R&D center for Food Dept.
Opened new center for Inorganic Materials Dept.
Acquired ISO14001 certification for Hanaten Plant No.1, Plant No.2 and Plant No.3.
Acquired ISO 14001 certification for all the facilities of OKUNO
Acquired ISO 9001:2000 certification for all the facilities of OKUNO
Published 100 years anniversary memorial book "Thoughts - Progress for 100 years" in commemoration of 100th anniversary since the establishment of OKUNO Shoten
Opened Plant No.5（for Food Dept.)
Established OKUNO-AUROMEX (THAILAND) CO., LTD.
Established OKUNO-AUROMEX (VIETNAM) CO., LTD.
Established OKUNO SHANGHAI TECHNOLOGY LTD.
Established OKUNO KOREA CO., LTD. in Seoul
Established HANATEN administration building
Established OKUNO International Corporation in Michigan, USA
Established OKUNO ASIA (THAILAND) CO., LTD. in Bangkok.
Established OKUNO (EU) OFFICE in Germany
Established OKUNO (THAILAND) CO., LTD.
Opened Advanced Technology Research Center
Established OKUNO CBC R&D CENTER (INDIA)
Changed OKUNO-AUROMEX （THAILAND）CO., LTD. to Auromex Co., Ltd. as agency
Changed OKUNO-AUROMEX （VIETNAM）CO., LTD. to Auromex Vietnam Co., Ltd. as agency
Opened Hanaten Physical Distribution Center
Established OKUNO TAIWAN CO., LTD.
Close OKUNO (EU) OFFICE
Opened Quality Assurance Center and Cafeteria