Mikimoto Kkichi ( , 25 January 1858 21 September 1954) was a Japanese entrepreneur who is credited with creating the first cultured pearl and subsequently starting the cultured pearl industry with the establishment of his luxury pearl company Mikimoto.He was inducted into the house of peers by imperial decree and posthumously awarded the Grand Cordon of the Order of the Sacred Treasure. On April 18, 1985, the Japan Patent Office selected him as one of Ten Japanese Great Inventors.The company was ranked as one of the world's most luxurious brands by Women's Wear Daily Magazine and Mikimoto was considered one of the best Japanese financial leaders of the 20th century by Nihon Keizai Shimbun. He is also known as the founder of Mikimoto Pharmaceuticals, a company specialising in beauty products containing pearl calcium. Mikimoto Pearl Island is named after him. In addition, the "Phoenix Mikimoto Crown" used by Miss Universe winners as well as the pageant crown used by Miss International is credited to his patented work.

A pearl is a hard, glistening object produced within the soft tissue (specifically the mantle) of a living shelled mollusk or another animal, such as fossil conulariids. Just like the shell of a mollusk, a pearl is composed of calcium carbonate (mainly aragonite or a mixture of aragonite and calcite) in minute crystalline form, which has deposited in concentric layers. The ideal pearl is perfectly round and smooth, but many other shapes, known as baroque pearls, can occur. The finest quality of natural pearls have been highly valued as gemstones and objects of beauty for many centuries. Because of this, pearl has become a metaphor for something rare, fine, admirable and valuable.

The most valuable pearls occur spontaneously in the wild, but are extremely rare. These wild pearls are referred to as natural pearls. Cultured or farmed pearls from pearl oysters and freshwater mussels make up the majority of those currently sold. Imitation pearls are also widely sold in inexpensive jewelry, but the quality of their iridescence is usually very poor and is easily distinguished from that of genuine pearls. Pearls have been harvested and cultivated primarily for use in jewelry, but in the past were also used to adorn clothing. They have also been crushed and used in cosmetics, medicines and paint formulations.

Whether wild or cultured, gem-quality pearls are almost always nacreous and iridescent, like the interior of the shell that produces them. However, almost all species of shelled mollusks are capable of producing pearls (technically "calcareous concretions") of lesser shine or less spherical shape. Although these may also be legitimately referred to as "pearls" by gemological labs and also under U.S. Federal Trade Commission rules, and are formed in the same way, most of them have no value except as curiosities.