In 1961, we became the first company in Japan to successfully synthesize a diamond.
Since then, we have found a great future in these tiny beautiful grains and have been pursuing their potential.
Succeeded in synthesizing the first diamond in Japan.
Ishizuka Research Institute Co.(=IRI_Hiroshi Ishizuka, President and Representative Director, a pioneer in the production of high-purity zirconium metal, titanium metal, and silicon metal, succeeded in synthesizing diamonds) launched for the first time in Japan.
IRI began mass production of synthetic diamonds.
IRI succeeded in enlarging the size of diamond synthesis equipment.
Contributed to the stable supply of industrial diamonds at low prices amid the increasing consumption of industrial diamonds during the period of high economic growth.
Established Tomei Diamond Industrial Co.Ltd
Transferring manufacturing and sales rights of industrial synthetic diamonds from IRI.
Established Osaka Tomei Diamond Co.
to strengthen sales of industrial diamonds in western Japan.
Established Tomei Diamond Co.
In order to strengthen export and domestic sales, the manufacture of synthetic diamonds was transferred from Tomei Diamond Industries to Tomei Diamond Corporation, and Tomei Diamond Industries became a sales company.
Established TOMEI CORPORATION OF AMERICA.
Established TOMEI CORPORATION OF AMERICA in New Jersey to make the demands of the U.S. market.
Established Tomei Diamond International Inc.
The overseas export division was transferred from Tomei Diamond Industrial Co.
We shall be known as Tomei Diamond Corporation.
Tomei Diamond Industrial Corporation, Osaka Tomei Diamond Corporation, Tomei Diamond Corporation, and Tomei Diamond International Corporation merged and changed the company name to Tomei Diamond Corporation.
Tomei Diamond Corporation merged with Ishizuka Research Institute, Inc.
And changed the company name to Tomei Diamond Corporation.
Received approval for management innovation plan from Tokyo Metropolitan Government
Relocate the head office, and established TOMEI DIAMOND USA.
Relocate the head office to the Oyama plant. We established TOMEI DIAMOND USA Inc. in Kentucky to improve service for our overseas customers.