History
| 1947 | Sep. | Sanro Kogyo Co., Ltd. inaugurated; Capital 8 million yen |
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| 1954 | May | Company renamed KOKUSAI KOGYO CO., LTD. |
| 1958 | Feb. | Head office moved to new building at 2 Rokubancho, Chiyoda-ku, Tokyo Japan |
| 1961 | Oct. | Listed on Second Section of the Tokyo Stock Exchange |
| 1985 | Apr. | Through joint investment with Tokyo Metropolitan Government, established Tokyo Data System as a third sector company (now 100% invested by KOKUSAI KOGYO CO., LTD.) |
| 1987 | Sep. | Listed on Stock designated on First Section of the Tokyo Stock Exchange |
| 2000 | Oct. | Acquired ISO 9001 certification, an international standard for quality management and assurance |
| 2001 | Mar. | Acquired certification to use PrivacyMark* |
| Oct. | Acquired ISO 14001 certification for environmental management systems | |
| 2007 | Mar. | Acquired certification for information security management system JISQ27001: 2006 (ISO/IEC27001: 2005) 2006 (ISO/IEC27001: 2005) |
| Oct. | Through equity transfer, established pure holding company KOKUSAI KOGYO HOLDINGS CO., LTD. (Securities Code: 9234) | |
| 2008 | Jan. | Real Estate & Development Department demerged to become KOKUSAI LAND & DEVELOPMENT CO., LTD. |
| Mar. | Environmental Solutions Division demerged to become KOKUSAI ENVIRONMENTAL SOLUTIONS CO., LTD. Acquired stock in Image ONE Co., Ltd., making it an equity method affiliate |
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| Apr. | Cultural Business Division demerged to become KOKUSAI BUNKAZAI CO., LTD. Established KKC SYSTEMS CO., LTD.,and Ryukyu Kokusai Kogyo Co., Ltd. |
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| 2010 | Feb. | Became a registered Issuer of Green Power Certificates |
| May | Announced Medium Term Management Plan 2010, "Re-engineering for Green Infrastructure" | |
| 2012 | Apr. | KOKUSAI KOGYO HOLDINGS CO., LTD. becomes wholly owned subsidiary of JAPAN ASIA GROUP LIMITED via exchange of shares. |
| 2013 | Mar. | Smart village at Green Community Tagonishi completed, ready for residents to move in |
| Sep. | KOKUSAI KOGYO CO., LTD. joined the United Nations Global Compact | |
| 2015 | Mar. | KOKUSAI ENVIRONMENTALSOLUTIONS CO., LTD. and Infrastructure Innovation Institute Inc. merged into KOKUSAI KOGYO CO., LTD. |
| May | JAPAN ASIA GROUP LIMITED (group holding company) upgraded from the second to the first section of Tokyo Stock Exchange (code: 3751) | |
| 2017 | Feb. | Meiji Consultant Co.,Ltd. becomes a subsidiary of KOKUSAI KOGYO CO., LTD. |
| 2018 | May | Established a Joint Venture, ‘ThinkTron Limited’, in Taiwan in partnership with a local company |
| Jul. | JAPAN ASIA GROUP LIMITED becomes the majority shareholder of PrimusTech Pte. Ltd., Singapore | |
| 2021 | Aug. | Head office moved to Shinjuku Front Tower, Shinjuku-ku, Tokyo |
| Sep. | Transferred all shares of KOKUSAI KOGYO CO., LTD. held by JAPAN ASIA GROUP LIMITED to Geo Holdings, L.P., which belongs to The Carlyle Group Inc. |
