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ADVANCED PRECISION,
FINEST MATERIAL
『Diamonds made in Japan』
Supporting industrial abrasives with in-house manufactured polycrystalline diamonds and custom-made classification technology
News
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May 31st, 2023
Website was changed to http://www.sumiseki.co.jp/dia
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July 6th, 2018
Acquired ISO9001:2015 license at Akabira Plant. (Diamond abrasives manufacturing)
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April 1st, 2016
Sumiseki Materials Co. established Dia Materials Corporation through a company split and took over the New Materials Department
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February 8th, 2010
Acquired ISO9001:2008 license at Akabira Plant. (Diamond abrasives manufacturing)
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October 1st, 2008
Sumitomo Coal Mining Co.,Ltd. changed it's name to Sumiseki Materials Co., Ltd.
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June 1st, 2006
Established our nanomaterial research institute
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April 25th, 2005
Relocated our main office and New Materials Department to Shimbashi, Minato-ku in Tokyo
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December 1st, 2004
Commenced nanodiamond operations.
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August 11th, 2004
Website was launched.
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December 1st, 2003
A Technical Sales team was established to respond more closely to customer requests.
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September 1st, 2002
Commenced mono-crystalline diamond and other abrasive materials operations.
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May 18th, 2001
Akabira Plant acquired ISO9001:2000 certification.(Manufacturing of industrial diamond products)
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April 1st, 2000
Commenced explosion synthesis and classification operations.
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October 1st, 1998
Doubled polycrystalline diamond production.
Polishing the future with innovative technology; World leader in polycrystalline diamond
Dia Materials Co., Ltd. is engaged in the manufacture and sale of polycrystalline diamonds, utilising the explosion technology developed over many years of mining.
As part of our expansion into new businesses, we started research and development in 1987. Commercial production and sales of diamonds commenced in 1991.
We carry out integrated production from synthesis to classification of diamonds in Japan, and boasts the world's leading production and sales volume in the market for polycrystalline diamonds synthesised by this impact compression method.
