| March 1946 |
Mitani Corporation was established in Fukui with capital of 180 thousand yen, and began selling agricultural implements and commodities. |
| December 1948 |
With the lifting of wartime regulations, resumed selling cement. |
| September 1949 |
With the lifting of wartime regulations, resumed selling coal. |
| July 1952 |
Started selling oil-based products. |
| May 1959 |
Started selling LP gas. |
| May 1961 |
Started selling air conditioners. |
| August 1962 |
Founded Mitani Petroleum Selling Corp. (now Corporation Mitani, a consolidated subsidiary). |
| May 1963 |
Founded Mitani Fresh Concrete Corp. (now Teramae Fresh Concrete Corp., a consolidated subsidiary). |
| December 1963 |
Listed on Osaka Exchange, 2nd Section. |
| March 1966 |
Founded Alpus Petroleum Selling Corp. (now Mitani Shiga Corp., a consolidated subsidiary). |
| March 1969 |
Founded Fukui Joho Shori Center Corp. (now Mitani Computer Corp., a consolidated subsidiary). |
| January 1972 |
Founded Mitani Jusestukiki Corp. (now Clean Gas Fukui Corp., a consolidated subsidiary). |
| June 1973 |
Founded Mitani Optical Kogyo Corp. (now Heart Optics Corp., a consolidated subsidiary). Started selling eyeglasses. |
| August 1975 |
Completed construction of Mitani Building (Fukui Headquarters). |
| January 1977 |
Started selling petrochemical products. |
| December 1977 |
Started managing restaurant in Nanjo Service Area in Hokuriku Highway. |
| March 1982 |
Founded Electronic Device Department (now Information Systems Department). |
| September 1983 |
Founded Mitani Otica in San Paulo, Brazil. Started selling eyeglasses (sold in January 2007.) |
| October 1987 |
Acquired all shares in Spectron, an eyeglass retailer in the United States (sold all shares in December 1998.) |
| June 1990 |
Founded Tokyo Headquarters (started 2 headquarters organizations.). |
| March 1997 |
Acquired Fukui Propane Gas Corp. (now Clean Gas Fukui Corp., a consolidated subsidiary). |
| February 2000 |
Listed on Tokyo Exchange, 2nd Section. |
| March 2001 |
Acquired Kita Nihon Denshi Corp., a semiconductor manufacturer (liquidated in March 2010). |
| December 2005 |
Acquired Nihon Bisoh Corp., a company that manaufactures, sells and leases gondolas (now a consolidated subsidiary). |
| March 2006 |
Acquired Komatsu TriLink Ltd., a semiconductor trading company (now KTL Corp., sold in April 2016.) |
| November 2006 |
Acquired Ishikawa Life Create Corp., a nursing-care home for the aged (now Spring Life Corp., a consolidated subsidiary). |
| September 2007 |
Acquired Tsurumi Petroleum Corp., a gas-station management company (now a consolidated subsidiary). |
| June 2010 |
Started Offshore Wind Power business.（Accepted third-party allocation of shares from Wind Power Ibaraki Corp., making it a consolidated subsidiary; now operating with 7 working wind turbines.） |
| September 2010 |
Transferred Tokyo Office (Tokyo Headquarters, Tokyo Office, Energy Department) from Nihonbashi to Marunouchi. |
| December 2010 |
Accepted third-party allocation of shares from Wind Power Corp., an offshore wind-power generating company, making it a subsidiary (now operating with 8 working wind turbines.) |
| September 2013 |
Founded Mitani Singapore Holdings Pte. Ltd. in Singapore (now a consolidated subsidiary). |
| November 2013 |
Founded Dama Trading Pte. Ltd in Singapore (now a consolidated subsidiary) and acquired a company that produces and processes acrylic boards. |
| March 2014 |
Founded Mutsue Wind Power Corp (now a consolidated subsidiary with five working wind turbines). |
| September 2017 |
Acquired Pacific Basin Partnership, Inc., a company that manufactures, processes and sells spices. |
| December 2017 |
Acquired Khong Lieng Trading Company Pte Ltd., a company that manufactures, processes and sells gasket |
| January 2018 |
Acquired Sirius Corp., a ODA specialized company, sales and trading of equipments such as medical equipment(now a consolidated subsidiary) |
| November 2019 |
Acquired MJI Universal Pte Ltd, a company that distributing of In gredients of Animal Feed |
| August 2020 |
Acquired LFA Global Pte. Ltd., a company that distributing of Valves and marine supplies (mainly for shipping industry) |
