| Aug 1946 | Kaga Tsushin Kogyo K.K. (present-day Kaga Inc.) is established in Kanazawa-shi, Ishikawa. |
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| Dec 1954 | Head office moves to 2-2-1 Nishi Shinbashi, Minato-ku, Tokyo. Tokyo sales office opens. |
| Apr 1956 | Factory is designated a model streamlined factory for small and medium-size enterprises. |
| Feb 1959 | Yokohama factory opens in Totsuka-ku, Yokohama-shi, Kanagawa. |
| Sep 1960 | KAGATUSINKOJI K.K. (present-day KAGA SYSTEMS Inc.) is established in Kanazawa-shi, Ishikawa. |
| Apr 1965 | Osaka sales office opens in Fukushima-ku, Osaka-shi, Osaka. |
| Apr 1966 | Kanazawa factor moves to Tsubata-machi, Kahoku-gun, Ishikawa. |
| Apr 1971 | KAGA TELECOM is established in Tsubata-machi, Kahoku-gun, Ishikawa. |
| Feb 1974 | KAGASEIKOU K.K. (present-day KAGA TECHNOLOGY Inc.) is established in Oshimizu-machi, Hakui-gun, Ishikawa. |
| Apr 1981 | Kaga(U.S.A.) is established in California, U.S.A. |
| May 1985 | Head office moves to 1-10-7 Nishi Shinbashi, Minato-ku, Tokyo. |
| Jan 1990 | Kaga Pacific Incorporated is established in California, U.S.A. |
| Sep 1991 | The name Kaga Kogyo K.K. changes to Kaga Inc., and the names of group companies change accordingly. |
| Oct 1994 | Head office moves to 6-9-6 Shinbashi, Minato-ku, Tokyo. |
| Dec 1994 | KAGA LIGHTING is established in Totsuka-ku, Yokohama-shi, Kanagawa. |
| Mar 1996 | Kaga(U.S.A.),INC. obtains ISO9001 certification. |
| Apr 1996 | Kaga Inc. obtains ISO9001 certification. KAGA TECHNOLOGY obtains ISO9001 certification. |
| Jun 1996 | Headquarters moves to 139 Akiba-cho, Totsuka-ku, Yokohama-shi, Kanagawa. |
| Jan 2001 | Kaga obtains ISO14001 certification. |
| Apr 2001 | Kaga Electric Industries (Wuxi) is established in Wuxi, Jiangsu Province, China. |
| Jul 2002 | KAGA SYSTEMS obtains ISO14001 certification. |
| Feb 2004 | Kaga Electric Industries (Wuxi) obtains ISO14001 certification. |
| Mar 2004 | KAGA TECHNOLOGY obtains ISO14001 certification. |
| May 2005 | Kaga Electric Industries (Wuxi) obtains ISO9001 certification. |
| Apr 2006 | KAGA SYSTEMS obtains ISO9001 certification. |
| Mar 2008 | Kaga (U.S.A.) obtains ISO14001 certification. |
| Aug 2008 | Osaka sales office moves to Suita-shi, Osaka. |
| Apr 2011 | Kaga (Thailand) Co, Ltd. is established in Prachinburi Province, Thailand. |
| Oct 2017 | Kaga moves its head office to Iwaodaiwa building, Tokyo. |