1950s: Rapid Growth
| Aug 1950 | Monthly production of telephones reaches 5,000 units. |
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| May 1951 | Production of electronic computing machines begins. Electronic calculation machine is delivered to the Tokyo Metropolitan Government office. |
| Apr 1952 | Technical cooperation with Siemens resumes. |
| Aug 1953 | Manufacture of radio communications equipment begins. |
| Apr 1954 | Production of electronic devices begins. |
| Oct 1954 | Japan's first relay-type, automated electronic computer, the FACOM 100, is completed. |
 FACOM 100 Relay-type Computer |
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| Dec 1956 | Japan's first numerically controlled device is introduced. First cross-bar type switching system is delivered. |
| Oct 1957 | Production of computing machines based on the parametron logic device begins. |
| Sep 1958 | First FACOM200 parametron computer is completed. |
| Nov 1959 | Oyama Plant opens for mass production of radio communication systems. |
