King Sejong and Hangul: How Korea's Alphabet Was Created

Hangul is the writing system used for the Korean language today. If you have ever studied Korean, you probably started with simple letters such as ㄱ, ㄴ, ㅏ, and ㅓ.

But Hangul is more than a set of letters. It has a clearly recorded history, and we know why it was created and who was responsible for it.

The story begins in the 15th century with King Sejong the Great, the fourth king of the Joseon Dynasty.

King Sejong wanted ordinary people to have a writing system that matched the sounds of the Korean language and was easier to learn. The new writing system was completed in 1443, and the explanatory work known as Hunminjeongeum was published in 1446. (유네스코)

Understanding this history can make learning Korean more interesting because many Hangul letters were designed according to clear principles rather than created as random shapes.

1. Why Did King Sejong Create Hangul?

Before Hangul existed, educated Koreans mainly used Chinese characters, known in Korea as Hanja (한자), for writing.

There was an important problem, however.

Korean and Chinese are very different languages. Using Chinese characters to represent Korean speech was difficult, especially for people who had not received years of formal education.

In the preface to Hunminjeongeum, King Sejong explained that the language of Korea was different from that of China and that ordinary people often had difficulty expressing what they wanted to say in writing. (국립국어원)

Learning Classical Chinese required considerable time and education. For farmers, craftspeople, women, and many other ordinary people, becoming fully literate was difficult.

King Sejong wanted to change this.

His goal was to create letters that people could learn and use more easily to write their own language.

The original name of the new writing system was Hunminjeongeum (훈민정음).

The name is commonly translated as:

“The Correct Sounds for the Instruction of the People.”

In other words, the alphabet was designed with practical communication in mind.

2. When Was Hangul Created?

Historical records state that King Sejong created a new set of 28 letters in 1443, during the 25th year of his reign. (국립국어원)

The new system was originally called Hunminjeongeum, not Hangul.

A few years later, in the ninth lunar month of 1446, the Hunminjeongeum manuscript was published with detailed explanations of how the writing system worked. (유네스코)

The book included explanations and examples known as the Haerye (해례).

It explained important ideas such as:

  • how the letters were designed

  • how consonants and vowels represented sounds

  • how letters could be combined

  • how Korean syllables could be written

The original alphabet contained 28 basic letters: 17 consonants and 11 vowels.

Some letters later disappeared from everyday use. Modern Hangul uses 24 basic letters: 14 consonants and 10 vowels, which can be combined into many additional sounds and syllable blocks. (국립국어원)

This means the Hangul you learn today is slightly different from the system used in King Sejong's time, but its basic structure remains closely connected to the original design.

3. How Were Hangul Letters Designed?

One of the most interesting parts of Hangul history is the way the letters were created.

Many alphabet systems developed gradually over hundreds or even thousands of years. Hangul, however, was deliberately designed using recognizable linguistic principles.

Consonants

Several basic consonants were based on the shape or position of the mouth and speech organs when producing a sound.

For example:

  • ㄱ represents the shape of the back of the tongue approaching the soft palate.

  • ㄴ represents the tongue touching the area behind the upper teeth.

  • ㅁ represents closed lips.

  • ㅅ was based on the shape of teeth.

  • ㅇ represents the throat.

Other consonants could then be created by adding strokes to these basic forms.

For example, ㄴ → ㄷ → ㅌ shows a visual relationship between sounds produced in similar parts of the mouth. (국립국어원)

This is one reason Hangul can feel surprisingly logical once you understand the system.

Vowels

The original basic vowels were built around three symbolic elements:

  • ㆍ — heaven

  • ㅡ — earth

  • ㅣ — human

These ideas came from traditional East Asian philosophy.

Other vowels were created by combining these basic elements. For example, the historical combinations eventually developed into familiar modern vowels such as ㅏ, ㅓ, ㅗ, and ㅜ. (국립국어원)

Hangul also has another unusual feature.

Instead of writing every letter in a straight line like the English alphabet, Korean letters are grouped into syllable blocks.

For example:

한

looks like one character, but it contains three letters:

ㅎ + ㅏ + ㄴ

The same principle appears in words such as:

한글 — Hangul

Each block represents one syllable.

This combination of alphabetic letters and syllable blocks gives Korean writing its distinctive appearance. (국립국어원)

4. Was Hangul Accepted Immediately?

Not everyone welcomed the new writing system.

Some members of the educated elite strongly valued Classical Chinese and opposed King Sejong's new letters.

In 1444, senior scholar Choe Man-ri and other officials submitted a petition criticizing the project. King Sejong rejected their objections and continued supporting the new writing system. (국립국어원)

This part of the story is important because Hangul did not instantly replace Chinese characters.

For centuries, Classical Chinese continued to hold great importance in government, scholarship, and elite education.

At the same time, the easier Korean writing system gradually found its own users and purposes.

Hangul became especially useful in areas such as:

  • personal letters

  • popular literature

  • songs and poetry

  • religious texts

  • educational materials

  • translations

One important early work was Yongbieocheonga (용비어천가), or Songs of the Dragons Flying to Heaven. It was completed in 1445 and later published using Hangul together with Chinese annotations. The National Museum of Korea describes it as the first publication produced during the creation and early promotion of Hangul. (국립중앙박물관)

The status of Korean writing changed significantly again in the late 19th century.

During reforms in 1894, government rules stated that laws and official documents were to be written primarily in Gukmun (국문), meaning the “national script,” with Classical Chinese added when necessary. (한국과학기술원)

The familiar name Hangul (한글) appeared later.

Korean linguist Ju Sigyeong (주시경) and his students are generally credited with helping establish and popularize the term Hangul in the early 20th century. (한국과학기술원)

5. Why Is Hangul Important Today?

Hangul eventually became the main writing system of modern Korean.

Today, Korean learners around the world encounter Hangul before almost anything else. Once you understand the basic consonants, vowels, and syllable-building rules, you can begin reading Korean words even if you do not yet know what they mean.

Hangul is also important as a historical document.

The surviving Hunminjeongeum manuscript preserves not only the letters themselves but also explanations of why and how the alphabet was designed.

In 1997, UNESCO added the Hunminjeongeum manuscript to its Memory of the World Register. (유네스코)

Korea also celebrates Hangul Day (한글날, Hangeullal) every year on October 9.

For Korean learners, knowing the history behind the alphabet can also make individual letters easier to remember.

Instead of seeing ㄱ, ㄴ, ㅁ, ㅅ, and ㅇ as completely random symbols, you can connect them to the way sounds are made.

And when you see vowels such as ㅏ, ㅓ, ㅗ, and ㅜ, you are looking at modern forms that grew from a carefully organized system created almost six centuries ago.

Conclusion

The history of Hangul is closely connected to King Sejong the Great and his desire to make written communication more accessible.

Before Hangul, writing Korean through Chinese characters required extensive education. King Sejong created a new writing system suited to Korean sounds, completing the alphabet in 1443 and introducing it through Hunminjeongeum in the 1440s.

The original system had 28 letters and followed clear principles based on pronunciation, sound relationships, and philosophical ideas.

Hangul did not replace Chinese characters overnight. It passed through centuries of social change before becoming the writing system used throughout Korea today.

For anyone learning Korean, this history offers a useful way to see Hangul differently.

ㄱ, ㄴ, ㅁ, ㅏ, and ㅓ are not simply symbols to memorize.

They are part of a writing system created with a specific purpose: to make the Korean language easier to write, read, and communicate.

Learning that story can make your first steps into Korean feel a little more meaningful.

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