• Oct.1937　　 Asahi Diamond Industrial Co., Ltd. founded in Tokyo’s Shinagawa Ward for manufacturing and 　　　　　　 marketing diamond tools.

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• June. 1938　 Construction of Yukigaya Factory in Ota Ward, Tokyo, begins

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• Jan.1944　　 Ueno Factory (formerly Mie Factory) completed in Ueno City (now Iga City), Mie Prefecture,                               launching diamond die sales.

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• Dec.1945　　Corporate name changed to Asahi Kogei

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• May 1950　　Head office moves to Chuo Ward, Tokyo

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• Jan.1951　　 Diamond bit sales launched.

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• Apr.1952　　 Diamond wheel sales launched.

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• May. 1952　   Corporate name changed back to Asahi Diamond Industrial

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• Feb.1953　　 Electroplated tool sales launched.

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• Oct.1955　　 Setagaya Factory completed in Ikejiri, Setagaya Ward, Tokyo, to expand diamond bit                                         production.

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• May.1956　    Diamond blade sales launched.

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• Apr.1961　　 Vitrified bond wheel sales launched

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• Aug.1961　　ID blade sales launched

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• Sept.1965　   Tamagawa Factory completed in Takatsu Ward, Kawasaki City, launching rotary dresser sales

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• May 1968　　Joint venture Taiwan Diamond Industrial Co., Ltd. (now Taiwan Asahi Diamond Industrial Co.,                             Ltd.) founded in Taiwan

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• Apr.1969　　 CBN abrasive powder sales launched

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• Sept.1972　　Participation in Sun Diamond Kogyo (now Yamanashi Asahi Diamond Industrial Co., Ltd.)

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• Oct.1972　　 Listed on the Second Section of the Tokyo Stock Exchange

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• Feb.1975　　Head office moves to Minato Ward, Tokyo

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• July 1976　　Diamond jewelry sales launched

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• May 1978　　Shinhan Diamond Industrial Co. founded as joint venture in South Korea

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• Sept.1978　   Listed on the First Section of the Tokyo Stock Exchange

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• Apr.1980　　 TAB tool sales launched

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• Aug.1984　　Mie Daini Factory completed in Ueno City (now Iga City), Mie Prefecture

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• Aug.1988　　Head office moves to Chiyoda Ward, Tokyo

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• Mar.1989　　 Chiba Tsurumai Factory and Research and Development Center completed in Ichihara City,                               Chiba Prefecture

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• June. 1989　  Wire saw sales launched

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• July. 1991　    Head office moves to New Otani Garden Court, Kioi-cho, Chiyoda Ward, Tokyo

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• Sept.1992　　Asahi Diamond Industrial wins the first TSE-listed company award

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• June. 1995　  Chiba Tsurumai Factory acquires ISO9002 certification

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• Sept.1995　   Asahi Diamond Industrial wins the fourth TSE-listed company award

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• Dec.1995　　Mie Factory, Mie No. 2 Factory, and Tamagawa Factory acquire ISO9002 certification

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• Mar.1999　　 Chiba No. 2 Factory completed in Chosei County, Chiba Prefecture

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• June. 2001　 Second building of Chiba No. 2 Factory completed

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• July. 2002　   Asahi Diamond America, Inc. founded

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• July. 2002　   Shanghai Xu Hui Diamond Industrial Co., Ltd. founded.

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• July. 2002　   Asahi Diamond Industrial acquires all shares in PT. Asahi Diamond Industrial Indonesia

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• Jan.2004　　 All factories in Japan, Yamanashi Asahi Diamond Industrial Co., Ltd., etc. acquire ISO14001 　　　　　　 certification

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• June. 2006　 New Mie Factory completed in Iga City, Mie Prefecture, to integrate Mie and Mie No. 2 Factories

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• July. 2006　   Hagby-Asahi AB sold to Sandvik AB

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• Aug.2006　　Tamagawa Plant expansion completed

 

• June. 2009　 Phase 3 building completed at Chiba No. 2 Factory

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• Jan.2011　　Mie Factory’s new building completed

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• July. 2013　  Asahi Diamond Industrial acquires all Koremura Co., Ltd. shares

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