The real scientific research certificate is issued by Zhu Zhen Institute of Science in Japan, and it is one of the most authoritative and well-known jewelry appraisal institutions in the pearl industry in Japan.

Founded in 1987, the founder Dr. Komatsu graduated from Tokyo Fisheries University. Worked in the research room of Mikimoto, a famous Japanese pearl brand. After the establishment of the institute, he studied arts and crafts and obtained a doctorate.