| 1921 |
(Taisho 10): Established Miyoshi Soap Industry Partnership to manufacture soap for the textile industry. |
| 1921-11 |
Founding: November 1921 |
| 1937 |
(Showa 12): Reorganized into Miyoshi Chemical Industry Co., Ltd., producing fatty acids and textile oil agents. |
| 1937-02 |
Establishment: February 1937 |
| 1941 |
(Showa 16): Began producing margarine at the Tokyo plant, entering the food sector. |
| 1949 |
(Showa 24): Changed name to Miyoshi Oil & Fat Co., Ltd., listed on the First Section of the Tokyo Stock Exchange, and opened Osaka branch (now Osaka branch). |
| 1950 |
(Showa 25): Opened Nagoya branch (now Nagoya branch) and started production of premium alcohol and powdered soap. |
| 1960 |
(Showa 35): Constructed facilities for synthetic detergents, edible oils, and industrial oils at Kobe plant. |
| 1962 |
(Showa 37): Opened Kyushu sales office (now Fukuoka branch). |
| 1967 |
(Showa 42): Constructed facilities for synthetic detergents, chemical products, and edible oils at Nagoya plant. |
| 1971 |
(Showa 46): Established Kanebo Soap Manufacturing Co., Ltd. within Nagoya plant through joint investment with Choubou Co., Ltd. (now Klassie Holdings Co., Ltd.), starting production of cosmetic soaps and shampoos. |
| 1972 |
(Showa 47): Established Nihon Mallett Co., Ltd. through a joint venture with US Mallett, starting production and sale of release oils and related machinery; established DAIYOH Miyoshi Chiba Essential Oil Plant Co., Ltd. through joint investment with DAIYOH Fisheries Co., Ltd. (now Maruha Nichiro Co., Ltd.) to produce edible oils. |
| 1975 |
(Showa 50): Developed and began selling chelating resin for heavy metal adsorption. |
| 1980 |
(Showa 55): Completed whipped cream factory at Tokyo plant and began sales. |
| 1986 |
(Showa 61): Established Miyoshi Co., Ltd. (now Miyoshi Soap Co., Ltd.) through joint investment with Tamano Soko Soap Co., Ltd., starting sales of household toiletry products. |
| 1988 |
(Showa 63): Operated powdered oil and fat production equipment at Chiba plant. |
| 1989 |
(Heisei 1): Completed Food Oil Technology Center in Tokyo and Oil Conversion Technology Center at Nagoya plant. |
| 1991 |
(Heisei 3): Integrated Japan Tank Terminal Co., Ltd., a storage business for animal and vegetable oils, and invested in Malaysian fatty acid manufacturer Palm Oleo Co. |
| 1992 |
Heisei 4: Absorbed and merged with Daiyo Miyoshi Chiba Essential Oil Plant, merged into Chiba plant. |
| 1995 |
Heisei 7: Great Hanshin-Awaji Earthquake occurred, Kobe plant was damaged, immediately began recovery. |
| 1996 |
Heisei 8: Separated the soap business and established Miyoshi Soap Manufacturing Co., Ltd. (now Miyoshi Soap Co., Ltd.). |
| 1998 |
Heisei 10: New margarine plant completed at Kobe plant. |
| 1999 |
Heisei 11: Food division of Nagoya plant transferred to Kobe plant. |
| 2001 |
Heisei 13: Established Food Research Institute (now Food Oil and Fat Research Institute) in Tokyo. |
| 2002 |
Heisei 14: New margarine plant completed at Chiba plant, consolidated margarine division of Tokyo plant into Chiba plant. |
| 2003 |
Heisei 15: Merged four sales subsidiaries and established Miyoshi Trading Co., Ltd. |
| 2016 |
Heisei 28: Established joint venture AAK Miyoshi Japan with Swedish AAK, entered chocolate fat business; new refining plant completed at Kobe plant. |
| 2019 |
Reiwa 1: Opened facility Café Margapane, a space concept centered on valuing connections with people through the power of fats and manufacturing; closed in July 2023. |
| 2020 |
Reiwa 2: Generated renewable energy from wastewater produced during manufacturing at Kobe plant, started power generation and sale. |
| 2021 |
Reiwa 3: 100th anniversary of founding. |
| 2024 |
Reiwa 6: Ami Warehouse completed in Ibaraki Prefecture. |
| 2025 |
Reiwa 7: Relocated headquarters to Sumida-ku, Tokyo; closed Tokyo plant and transferred operations to Chiba and Kobe plants. |
