Teeth blackening or teeth lacquering is a custom of dyeing one's teeth black. It was most predominantly practiced in Southeast Asian and Oceanic cultures, particularly among Austronesian, Austroasiatic, and Kra–Dai-speaking peoples. It was also practiced in Japan prior to the Meiji era, as well as in India. It was also performed among some groups in the Americas, most notably among the Shuar people of northern Peru and Ecuador. Teeth blackening is usually done during puberty. It was primarily done to preserve the teeth into old age, as it prevents tooth decay similar to the mechanism of modern dental sealants. It was seen as a sign of maturity, beauty, and civilization. A common belief is that blackened teeth differentiated humans from animals. Teeth blackening is often done in conjunction with traditions of tooth sharpening and dental evulsion, as well as other body modification customs like tattoos. Teeth blackening and filing were regarded with fascination and disapproval by early European explorers and colonists. The practice survives in some isolated ethnic groups in Southeast Asia and Oceania but has mostly disappeared after the introduction of Western beauty standards during the colonial era, and continues among many minority groups in China, Pacific Islands and Southeast Asia. It is mainly prevalent in older women, though the practice is still carried on by some younger women. Sometimes artificial teeth are used to achieve blackened teeth. Teeth blackening is commonly confused with the red-stained teeth from betel chewing. However, betel chewing damages the teeth and gums, while teeth blackening does not. East and Southeast Asia Japan In Japan, teeth blackening is known as . existed in one form or another for hundreds of years, and was seen amongst the population as beautiful until the end of the Meiji period (1868–1911). Objects that were pitch black, such as glaze-like lacquer, were seen as beautiful. Name The word was an aristocratic term. There is an alternate term for , . At the old Imperial palace in Kyoto, it was called . Among civilians, such words as , and were used. History Traces of blackened teeth can be seen in the buried bones and of the Kofun period (300–538 CE). References to exist in The Tale of Genji and . At the end of the Heian period, at the time when aristocratic men and woman reached puberty and celebrated their or , the Taira clan and other samurai, and pages