| 1966/April | Ueno Music Academy is established on site of the Head Office. |
| 1977/April | Mirage Trading Co., Ltd. is established Business Outline: Import and sales of gemstone. Manufacture the gemological instrument. |
| 1987/April | Sales branch is opened in Taito-ku, Tokyo. |
| 1988/March | Hotel business is started |
| 1989/March | The first hotel is acquired |
| 1991/December | Mirage building is built at the current address Hotel Business Division and Industrial Instruments Manufacturing Division are founded. |
| 1994/October | Patent for Electronic Densimeter is acquired in Japan. |
| 1996/February | Management Hotels are are reached to 21 locations. |
| 1998/August | Capital is increased to JPY80,000,000. |
| 2000/December | Diamond Selector II has sold over 150,000 units. |
| 2001/December | Industrial Instruments Manufacturing Division is separated and Alfa Mirage Co., Ltd. is established. |
| 2002/April | The sales of electronic densimeter has exceeded 10,000 units. |
| 2009/January | Steam clearner is launched. |
| 2009/December | Alfa Mirage becomes authorized distributor of GIA (Gemological Institute of America Inc). |
| 2011/November | Precious Metal Tester GKS series are launched. |
| 2012/February | Electronic Densimeter MDS series are launched. |
| 2014/April | Olympus XRF gold expert is launched. |
| 2014/November | Quick digital thickness gauge MRG-25 is launched. |
