History › Middle ages › Joseon dynasty of Korea
Hangul, Korea's alphabet (King Sejong)
created 1443; published 1446· Invention or discovery· Asia
Well documentedSolid records, physical evidence or scientific consensus.
In 1443 King Sejong (세종) created a phonetic alphabet so ordinary Koreans could read and write their own language.
See it on the History map →What happened
Educated Koreans wrote in Chinese characters, which took years to learn and fit Korean speech poorly. Sejong devised 28 letters, published in 1446 as Hunminjeongeum (훈민정음), 'The Correct Sounds for Instructing the People'. Consonants are drawn to show the shape of the mouth and tongue making each sound; vowels combine a dot, a horizontal line and a vertical line, for heaven, earth and humankind. Letters stack into syllable blocks. Chinese characters stayed the elite script for centuries.
Why it matters
One of the few scripts deliberately designed from scratch, it underpins Korea's near-universal literacy today. It became the official script only in 1894 and is a core symbol of Korean identity.
How we know
The 1446 Hunminjeongeum Haerye, an explanatory manual by Sejong's scholars, rediscovered in 1940 and now a UNESCO Memory of the World document, explains the design.
Still debated
Whether the Mongol-era 'Phags-pa script influenced some letter shapes, as a few scholars argue, is debated.
Connections (2)
▸Joseon dynasty of Korea created Hangul, Korea's alphabet (King Sejong)Well documented
The connection
King Sejong, Joseon's fourth ruler (reigned 1418–1450), wanted commoners to read laws, petitions and moral guides. Working largely in private, he announced the new alphabet in 1443. Neo-Confucian officials objected: Choe Manri warned that dropping Chinese characters would make Korea like the barbarians. The script survived through poetry, letters and religious texts, used especially by women and commoners.
When and how
Hanyang (Seoul), 1443–1446; King Sejong, probably with scholars of his Hall of Worthies such as Jeong In-ji, Seong Sam-mun and Sin Suk-ju.
How we know
The Annals of the Joseon Dynasty record Sejong's announcement and the officials' protest of 1444; the 1446 Hunminjeongeum Haerye explains the design.
Debates and open questions
The Annals credit Sejong personally, while some historians see a team project; how much he designed himself, and why he worked so quietly, are debated.
▸Japanese rule of Korea restricted the teaching of Hangul, Korea's alphabet (King Sejong)Well documented
The connection
Early colonial schools still taught Korean, but from 1938 the Government-General made it an optional subject and then dropped it, pushing Japanese-only education. Korean-language newspapers were closed in 1940, and in 1942 police arrested Korean Language Society members compiling a Hangul dictionary. Keeping Hangul alive became a symbol of Korean identity.
When and how
Across colonial Korea, mainly 1938–1945, in the assimilation drive launched by Governor-General Minami Jirō (1936–42); the 1942 arrests targeted Korean Language Society scholars such as Choe Hyeon-bae.
How we know
Colonial education ordinances, school curricula, newspaper closure orders and court records of the Korean Language Society case; the seized dictionary manuscript was rediscovered in a Seoul warehouse in 1945.
Debates and open questions
Historians weigh how complete the suppression was in practice, since Hangul stayed in private and some print use, and how much earlier colonial spelling rules helped standardize it.