
| Year | Month | Event |
|---|---|---|
| 1918 | 3 | Shokosha Watch Research Institute established, the forerunner of Citizen Watch Co., Ltd. |
| 1930 | 5 | Citizen Watch Co., Ltd. established. |
| 1936 | 5 | Tanashi Factory constructed. |
| 1946 | 3 | Eiichi Yamada appointed president. |
| 1949 | 6 | Citizen Trading Co., Ltd. established. |
| 1953 | 3 | Rhythm Watch Co., Ltd. becomes an affiliate. |
| 1958 | 1 | Watch exports to China commenced. |
| 1960 | 3 | Import-export agreement concluded with the U.S. Bulova Watch Co. Technical assistance agreement with India. |
| 1964 | 8 | Technology research laboratory established. |
| 12 | Citizen Business Machines established (present-day Japan CBM Corp.). | |
| 1971 | 6 | Precision Machinery Division established. |
| 1978 | 2 | Head Office moved to Shinjuku Mitsui Bldg. in Tokyo. |
| 1981 | 6 | Rokuya Yamazaki appointed president. |
| 10 | Systems and Peripherals Division established. | |
| 1982 | 9 | Special Sales Division established. |
| 1987 | 6 | Michio Nakajima appointed president. |
| 1992 | 2 | Acquired German machine tool company, Boley GmbH. |
| 1996 | 4 | Solar-powered Eco-Drive received the Eco Mark the first for a watch. |
| 1997 | 6 | Hiroshi Haruta appointed president. |
| 2001 | 3 | Head Office moved to Nishi-Tokyo. |
| 2002 | 6 | Makoto Umehara appointed president. |
| 2004 | 1 | Implemented Citizen Code of Conduct. |
| 10 | Consolidated takeover of Citizen Trading Co., Ltd. | |
| 2005 | 4 | Citizen Systems Japan Co., Ltd. and Citizen Displays Co., Ltd. established. |
| 10 | Changed the corporate names of the Citizen Group companies. | |
| 2006 | 3 | Established new R&D building. |
| 2007 | 4 | Changed the corporate name of the Citizen Watch Co., Ltd. to Citizen Holdings Co., Ltd. and moved into a pure holding company system. Citizen Watch Co., Ltd., Citizen Technology Center Co., Ltd., and Citizen Business Expert Co., Ltd. established. |