DIAMOND

The diamond is a gemstone with an inextinguishable brilliance and has been revered over many years as a symbol of eternity. Transcending national borders and the ages, the king of all gem stones is brought to life under the hand of skilled craftsmen.
Our commitment in every stage of production is to bring to life and ignite the fire in every diamond. In each diamond is a unique brilliance that can only be realized with the ultimate in quality and skilled craftsmanship.

Japan’s only sightholder

TASAKI is involved in every stage of the diamond process in order to deliver only the highest quality jewelry. TASAKI has worked tirelessly under this philosophy, and in 1994, obtained its qualification as a sightholder. A sightholder is a company authorized to purchase rough diamonds directly from the world’s largest supplier of rough diamonds, the De Beers Group and must pass a range of stringent screening criteria. All sightholders must clear all of the criteria, which include having a discerning eye and cutting technology, marketing capability, a reliable logistics system, future potential and being able to provide full traceability. There are currently only 82 listed sightholders around the world, with TASAKI making the only sightholder in Japan.
Sightholders hold the highest status in the diamond industry and while they are required to be listed on the stock exchange or hold a higher position, they also assume the role of having to fulfill their social responsibilities as leaders of the diamond industry therefore are subject to full information disclosure and regular external audits performed by independent auditors.
One merit of being a sightholder is having access to participate in sights (exhibitions) held 10 times each year which allows them to purchase diamonds from the very top of the food chain. Receiving information promptly through the sightholder network makes it possible to ensure a stable supply of the highest quality diamonds at the right prices. Being a sightholder enables TASAKI to purchase its own rough diamonds and cut them as they see fit.

Japan’s only sightholder

Stunning beauty from nations at peace

TASAKI will only purchase rough diamonds that can be proven to have been produced by countries at peace. TASAKI only purchases rough stones that come with certification of the place of production from the supplier and a Kimberley Process Certificate issued by the government of the country of export. At present, TASAKI only purchases from four nations, including Botswana, South Africa, Namibia and Canada. TASAKI is totally committed to clean and ethical trading practices in line with the stringent regulations established by the De Beers Group.
For example, we are continuously seeking ways to respect our limited natural resources and give back to society through our diamonds, and this includes refilling mines once they have been exhausted and replanting forests with the aim of preserving the natural environment, taking responsibility for the correct disposal of diamond dust from the cutting process and creating employment opportunities in diamond producing nations.

Stunning beauty from nations at peace

What is the Kimberley Process Certification Scheme

The Kimberley Process Certification Scheme is an international certification scheme to prevent the import and export of rough diamonds used to finance war on legitimate governments.
This scheme was introduced into Japan in 2003 and the import and export of rough diamonds to or from Japan requires a Kimberley Process Certificate issued by the government.

What is the Kimberley Process Certification Scheme

TASAKI’s Diamantaire

Those who trade diamonds have long been referred to as ‘diamantaire’ and a unique network has continued to exist for several hundreds of years. Masanobu Ebisutani is one of the very few people in Japan who hold the title of diamantaire. Enchanted by the charm of stones in his school years, Masanobu traveled to Israel in search of experience after joining TASAKI.
The most important attribute of a diamantaire is not a discerning eye or knowledge of diamonds, but a matter of trust, the bedrock of the diamond industry. In order to obtain his license, Masanobu was subject to a polygraph test and handwriting analysis followed by interviews performed by psychologists. There are no contracts in the world of diamond trading. A deal is sealed with the term ‘Mazal’, Hebrew for ‘luck and blessing’, usually followed by a handshake. It is not rare for a deal totaling several millions of yen to be sealed on a single handshake. People in the diamond industry are taught to use their left eye for the diamonds and their right to judge those they are dealing with, and this illustrates how important it is in this line of work not only to have a discerning eye for diamonds, but also for people.
The skill of a diamantaire is said to be proportional to the number of diamonds they have inspected and to date, Masanobu has inspected over 600,000 stones. His credentials are so rare that his eyes and fingers are insured. All the rough diamonds handled by TASAKI must first pass his extremely discerning eye.

TASAKI’s Diamantaire

The skill of craftsmen who preside over measurements as precise as one hundredth of a millimeter

In the TASAKI workshop, craftsmen work silently in an atmosphere of nervous tension. Diamond cutting is extremely precise and delicate work, with craftsmen presiding over cuts as precise as one hundredth of a mm and weights of five thousandths of a gram. Some of the work is done by machine however, ultimately, the sensitivities of man are said to be superior to machines when it comes to diamonds. It takes at least five years to become a competent master. TASAKI regularly sends employees to complete diamond appraisal and other educational courses with the world’s most recognized courses run by the GIA (Gemological Association of America), promoting technological exchange in order to ensure superior craftsmanship.
Our craftsmen pursue perfection and are always challenging the boundaries of their ability. This stoic attitude of our craftsmen, who accept no compromise, has succeeded in the mass production of Excellent grade diamonds in a global market where it is difficult to place above the grade of Very Good, and has grown into a leader in the diamond industry. TASAKI has since improved this technology, achieving a grade of 3EX for 100% of the diamonds cut by TASAKI in a round brilliant cut. The fact that we are involved in every stage of transforming a rough stone into a stunning diamond shows that we understand the true nature of diamonds and assume responsibility for each and every process. Here at TASAKI, we believe that holding total control over quality is the essence of true manufacturing and is the key to total customer satisfaction.

The skill of craftsmen who preside over measurements as precise as one hundredth of a millimeter