Tavernier wrote about 1670: “It is possible that of those who have written before me concerning pearls, none have recorded that some years back a fishery was discovered in a certain part of the coasts of Japan, and I have seen some of the pearls which the Dutch brought from thence. They were of very beautiful water, and some of them of large size, but all baroques. The Japanese do not esteem pearls. If they cared about them it is possible that by their means some banks might be discovered where finer ones would be obtained.”[176] In 1727, Kaempfer wrote that pearls, called by the Japanese _kainotamma_ or shell jewels, were found in oysters and other mollusks almost everywhere about Saikokf. Every person was at liberty to fish for them. Formerly the natives had little or no value for them, till they learned of their estimation by the Chinese, who were ready to pay good prices for them, their women being very proud of wearing necklaces and other ornaments of pearls. “The largest and finest pearls are found in the small sort of oysters, called _akoja_, which is not unlike the Persian pearl-oyster. These are found only in the seas about Satzuma and in the Gulf of Omura (Kiusiu). Some of the pearls weigh from four to five candareens[177] and these are sold for a hundred kobans each.[178] The inhabitants of the Loochoo Islands buy most of those about Satzuma, since they trade to that province. Those found on the Gulf of Omura are sold chiefly to the Chinese and Tunquinese, and it is computed that they buy for about 3000 taels[179] a year. This great profit occasioned the strict orders, which were made not long ago by the princes both of Satzuma and Omura, that for the future there should be no more of these oysters sold in the market with other oysters, as had been done formerly.”[180] Kaempfer also noted that the Japanese obtained pearls from the yellow snail shell and from the _taira gai_ (Placuna) in the Gulf of Arima, and especially from the awabi or abalone (Haliotis). This mollusk was much sought after for food, being taken in large quantities by the fishermen’s wives, “they being the best divers of the country.”[181] Of the several species of pearl-oysters which occur in the coastal waters of Japan, the only one of importance at present is the _Margaritifera martensi_. While this occurs in very many localities, it is most numerous among the southern islands, where some fine pearls have been secured. The fishery for this species was quite extensive thirty or forty years ago, and the reefs were largely depleted. For nearly a score of years it has been used in growing culture pearls, an account of which is given on pages 292, 293.