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| 1972 | Nov. | Nov. Nichii Maintenance Co., Ltd. is established in Higashi-ku, Osaka. |
| 1976 | Mar. | Business name is changed to Japan Maintenance Co., Ltd. |
| 1995 | Apr. | Headquarters is moved to Minamisenba , Chuo-ku, Osaka. |
| Sep. | Capital is increased to 3,238 million JPY. Company is listed on the second section of the Osaka Securities Exchange. |
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| 1999 | July. | Company is listed on the second section of the Tokyo Stock Exchange. |
| 2000 | Feb. | Company is listed on the first section of the Tokyo Stock Exchange. Company is listed on the first section of the Osaka Securities Exchange. |
| Nov. | Three administrative centers in the Osaka branch acquire Quality Management System (ISO9002) certification. | |
| 2001 | June. | Japan Maintenance Academy Co., Ltd. is established. |
| 2003 | July. | Headquarters and Tokyo Office of AEON Techno Service Co., Ltd. acquires Environmental Management System (ISO14001) certification. |
| 2004 | Mar. | Japan Maintenance Security Co., Ltd. is established. |
| July. | Company acquires all the shares of Asahi Bank Building Maintenance Co., Ltd. reforming it into affiliate company Japan Maintenance Seres Co., Ltd. | |
| Dec. | Company acquires all the shares of Towers Co., Ltd., reforming it into affiliate company Japan Maintenance Towers Co., Ltd. | |
| 2005 | Dec. | All companies acquire Quality Management System (ISO9001) certification. |
| 2006 | May. | Company acquires all the shares of AEON Techno Service Co., Ltd. |
| Sep. | Company merges with AEON Techno Service Co., Ltd. Business name is changed to AEON DELIGHT CO., LTD. |
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| 2007 | May. | Company forms a business and capital alliance with A to Z Service Co., Ltd. |
| Sep. | AEON DELIGHT (BEIJING) CO., LTD. is established. | |
| 2008 | Mar. | Company forms a business alliance with NEMOTO & CO., LTD. |
| Oct. | Company acquires 40% of the shares of Kankyouseibi Co., Ltd. and affiliates the company. | |
| 2009 | Apr. | Company acquires 40% of the shares of DO SERVICE Co., Ltd. and affiliates the company. |
| July. | Company acquires Environmental Management System (ISO 14001) certification. | |
| 2010 | Feb. | Company completes construction of research and training facility "AEON DELIGHT Academy Nagahama" in Nagahama City, Shiga Prefecture. |
| June. | Business areas of AEON DELIGHT Seres Co., Ltd. and AEON DELIGHT Towers Co., Ltd. transferred to AEON DELIGHT. | |
| Sep. | Company merges with CERTO Corporation. Company affiliates CERTO (BEIJING) COMMERCE CO., LTD. (present AEON DELIGHT (BEIJING) COMMERCE CO., LTD.) |
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