At Primo Japan, our skilled craftsmen and diamond buyers with expertise in product quality and local production shape a couple’s “ring that commemorates a lifetime”.

WFDB Affiliation


In July 2008, our company became affiliated with the Tokyo Diamond Exchange, an association made up of Japan’s leading diamond dealers. In October of the same year, we became certified as an official member of the World Federation of Diamond Bourses (WFDB), an international organization whose aim is to promote information sharing and problem solving with regard to diamond trading throughout the world. We will continue to stay up to date on domestic and foreign diamond markets and offer the latest information to our customers.

Japan Jewellery Association (JJA) Affiliation

The Japan Jewellery Association (JJA) is a trade association established to address various issues related to the jewelry industry. JJA’s mission is to support robust development of the jewelry industry through activities such as conducting surveys and research relating to jewelry, promoting research and collaborations among domestic and foreign affiliated organizations, etc. We have joined the association as a regular member and strive to stay informed about jewelry, human resource development, and human resource exchanges within the industry.

The World’s Largest Diamond Trading Market: Tel Aviv, Israel


At Primo Japan, we purchase raw materials, including our diamonds, only from trusted suppliers with whom we have developed a working relationship over a long period of time. In addition, we maintain our own dedicated buying office at the Israeli Diamond Exchange, the largest diamond exchange in the world, directly importing diamonds that have been personally selected by our experienced diamond buyers. Through our strong networks in key areas of the diamond trading supply chain, we have established a system by which we can routinely maintain stocks of high-quality diamonds at a fair price. Since all of our center diamonds are sold with a certificate issued by an expert appraisal institute, our customers can purchase center diamonds with peace of mind.