| January 1923 | Founder, Yoheiji Oya started selling tools at 5129 Jukkenzaka, Chigasaki Kanagawa. |
| June 1953 | To commemorate the 30th anniversary of foundation, incorporated Marukoshi Store with a capital of 60,000yen. Started selling transmission parts. |
| July 1957 | Moved head office to 1-1-1 Tomoe ,Chigasaki. Started selling Hydraulic and pneumatic equipment. |
| November 1970 | Relocated head office to 5-16-17 Nango , Chigasaki. Started selling material handling equipment. |
| June 1972 | Changed trade name to Marukoshi Co., Ltd. and increased capital to 5 million yen |
| September 1973 | In commemoration of the 50th anniversary of foundation and the 20th anniversary of incorporation, the new head office was built building. |
| Aplil 1975 | Increased capital to 10 million yen. Started selling automation equipment. |
| June 1989 | Established overseas sales division. |
| November 1993 | In commemoration of 70th anniversary of foundation. and the 40th anniversary of incorporation , increased capital to 30 million yen. |
| August 1996 | Established sales company in Singapore following expansion of overseas sales department. Company name "Mac International Equipment Pte.,Ltd. " |
| January 2013 | 90th anniversary of foundation. |
| January 2023 | 100th anniversary of foundation. |
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