| 1952 |
Establishment of Nihon-Atsudenki Co., Ltd by the founder, Kohei Sato on Aug 16th . |
| 1955 |
Started Production of Elastic Amateur Cartridge. Relocated the main factory from Suginami-ku to Mitaka-shi. |
| 1957 |
Completion of constant temperature and humidify chamber, and transformer substation. |
| 1958 |
Started the development of auto record changer. |
| 1961 |
President Kohei Sato received the Tokyo Gubernational Award for his invention. |
| 1963 |
Started production of Juke-Box. Started development and production of radio-equipped portable music player. |
| 1966 |
Started volume production of high- performance ceramic cartridge and dynamic cartridge, an electronic accounting machine. Participation in the Electronics Show. |
| 1967 |
Entered into the field of Wireless Technologies. |
| 1968 |
Started research and development of Electro Condenser Microphone |
| 1969 |
President Kohei Sato received the Medal with Purple Ribbon for his invention related to Rochelle salt-piezoelectric element. The company was awarded its contribution to exports, completion of the development of Magnetic-Head. |
| 1970 |
Started production of Magnetic-Head and Condenser Microphone Unit. |
| 1978 |
Entered into the filed of Amateur-Wireless Business. Participation in the JAIA Fair. |
| 1980 |
Kohei Sato, the founder passed away. Fuminori Sato became the new president, Nobuko Sato became chairman. Former president Kohei Sato received the Fourth Order of the Sacred Treasure for his lifetime contribution to invention. |
| 1983 |
Opened the Chicago(U.S.A) office. |
| 1984 |
Acquired Iwate Hokushin Co., Ltd and trade name to IWATE AZDEN Corporation. Established AZDEN CORPORATION in Chicago, U.S.A. Relocated the office to New York in October. |
| 1989 |
Started volume production of audio accessories, headphones, microphones. |
| 1993 |
Company name changed to AZDEN CORPORATION |
| 1994 |
AZDEN received the 19th Invention Awards-Sasagawa Special Awards sponsored by Japan Institute of Invention and Innovation and Nikkan Kogyo Shimbun, Ltd. |
| 1995 |
Participation in the NAB show in U.S.A. for the first time. Started volume production of mobile phone receiver. |
| 1998 |
President Fuminori Sato received the scientific Technology Administration Award for the promotion of science and technology. |
| 2004 |
Iwate Factory obtained ISO14001 certificate. |
| 2016 |
Acquired AZDEN Iwate Co., Ltd. |
