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History
| 1956 | Engaged in the manufacturing field of magnets and semiconductors, and started various products development and research for industrial and medical use. |
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| 1974 | Established Japan Athletic Industry Co., Ltd. for the purpose of manufacturing and selling medical devices. |
| 1975 | Obtained a license from the Ministry of Health and Welfare as a medical device manufacturer. Obtained approval from the Ministry of Health and Welfare for magnetic underwear, magnetic waist supporter, and magnetic foot center supporters, and started sales. |
| 1978 | Completed clinical trials of magnetic pillows and magnetic bedding futons, obtained approval from the Ministry of Health and Welfare, and started sales. |
| 1979 | Completed clinical trials of magnetic supporters for elbows and knees, obtained approval from the Ministry of Health and Welfare, and started sales. |
| 1980 | Completed clinical trials of platinum magnetic necklaces and obtained approval from the Ministry of Health and Welfare. |
| 1982 | Completed clinical trials of magnetic quilts and obtained approval from the Ministry of Health and Welfare. |
| 1984 | Obtained approval from the Ministry of Health and Welfare for AC type potential therapy device and DC type cordless potential therapy device. Started sales of magnetic quilts. |
| 1993 | Changed the company name from Athletic Industry Co., Ltd. to NAC Corporation. |
| 1994 | Started selling platinum magnetic necklaces. |
| 1997 | Started selling household potential therapy devices. |
| 2000 | Obtained approval of the cordless potential therapy device from Ministry of Health, Labour and Welfare and started sales. |
| 2005 | Obtained approval from the Ministry of Health, Labour and Welfare for a new cordless potential therapy device and started sales. |
| 2006 | Obtained certification for magnetic therapy device (supporter). |
| 2007 | Obtained the right for medical device manufacturing and sales business. Obtained certification for magnetic therapy devices (necklaces). |
| 2015 | Obtained certification for magnetic therapy device (new supporter). |
NAC’s "Controlled Medical Devices" approval and certification:
Controlled medical devices approved by the Ministry of Health, Labour and Welfare (112 projects) and certified products (27 projects)
Industrial property rights: 54 patents including foreign patents