05/08/2026
"For 1,000+ years, black teeth were the ultimate beauty standard in Japan. Here's the strange, fascinating history of Ohaguro 👇"
1️⃣ A tradition over 1,000 years old — Traces of blackened teeth appear on bones and clay haniwa figures from Japan's Kofun period (300–538 CE), and the custom, known as ohaguro, stayed popular through the Heian and Edo periods, from the 10th century until the late 19th century.
2️⃣ The "recipe" was iron and vinegar — Teeth were dyed using kanemizu, a solution made from ferric acetate created by soaking iron filings in vinegar, mixed with tannin from vegetables or tea.
3️⃣ It was a mark of status, not shame — Ohaguro was practiced mainly by married women and some men, almost always members of the aristocracy and samurai, and it also signaled a woman's transition into adulthood, particularly after marriage or childbirth.
4️⃣ It doubled as ancient dental care — The dark pigment helped protect teeth from decay and strengthened the enamel, with the iron-tannin compound forming a sealant that prevented tooth decay — an accidental dental treatment centuries ahead of its time.
5️⃣ It disappeared almost overnight — Ohaguro was outlawed during the Meiji era as part of Japan's modernization and adoption of Western customs, with the government viewing blackened teeth as a symbol of backwardness, and by the era's end the practice had all but vanished.
