| Oct., 1989 | Founded in Ueno, Taito-Ku, Tokyo, with paid-in capital 2,750,000 Yen |
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| Nov., 1990 | Moved to Negishi, Taito-Ku, Tokyo |
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| Mar., 1991 | Capital increasement to 10,000,000 Yen |
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| Sep., 1991 | Opened Kashiwa office |
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| Apr., 1992 | Opened Utsunomiya office |
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| Feb., 1993 | Capital increasement to 20,000,000 Yen |
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| Oct., 1994 | Head office moved to Matsugaya, Taito-Ku, Tokyo and changed company name from Liberty Shell to ACTIS |
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| Feb., 1995 | Moved Kashiwa office to Tennodai, Abiko City, Chiba-Ken and changed the office name to Abiko office |
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| Mar., 1995 | Capital increasement to 22,000,000 Yen |
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| Mar., 1996 | Head office moved from Matsugaya, Taito-Ku, to Higashi-Nippori, Aragawa-Ku, Capital increasement to 27,000,000 Yen |
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| Oct., 1997 | Capital increasement to 35,700,000 Yen |
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| Mar., 1998 | Capital increasement to 40,750,000 Yen |
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| Apr., 1998 | Opened Kobe office |
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| Mar., 1999 | Opened Sapporo office, capital increasement to 56,500,000 Yen |
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| Dec., 2000 | Capital increasement to 99,700,000 Yen |
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| Mar., 2001 | Opened Fukuoka office |
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| Dec., 2001 | Capital increasement to 137,325,000 Yen |
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| Mar., 2002 | part of divisions achived ISO9001 certification |
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| Nov., 2002 | Opened Osaka office |
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| Jan., 2003 | Opened Hiroshima office |
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| Aug., 2005 | Opened Kushiro office |
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| Jun., 2006 | Head office moved to Chiyoda-Ku, Tokyo |
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| Oct., 2006 | Opened Matsumoto office |
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| Oct., 2009 | Acquisition of PrivacyMark certification |
