Korean Soju Explained: History, Culture & How It’s Made
When thinking of Korean cuisine, especially in the realm of alcoholic beverages, one iconic drink immediately comes to mind — soju. Known as Korea’s “national drink”, soju has gained global recognition for its smooth taste, versatility, and cultural significance. Typically served in its signature green bottle, this clear spirit is available in a wide variety of fruity flavours as well as its classic form. Despite its relatively high alcohol content, soju is well-loved for its light, slightly sweet profile, making it easy to enjoy either on its own or with food. Over the years, soju has become one of South Korea’s most successful exports, finding its way into bars, restaurants, and homes across the world.
What Is Soju? Korea’s Iconic Distilled Spirit Explained
Soju (소주) is a clear, distilled spirit traditionally made using grains or starches such as rice, barley, or sweet potatoes. It is a strong alcoholic beverage, typically ranging between 16% and 25% ABV (alcohol by volume), although lighter versions between 12–14% have grown in popularity, particularly in international markets.
What sets soju apart is its smooth, clean taste paired with a subtle sweetness, making it highly versatile. It can be enjoyed neat, sipped alongside food, or used as a base in various cocktails. In Korean dining culture, soju is a staple – especially when paired with grilled meats, spicy stews, or fresh seafood. Among adults, it remains one of the most commonly consumed alcoholic drinks during social meals and gatherings, embodying both tradition and conviviality.
The History of Soju: From Mongol Influence to Korean Tradition
The history of soju in Korea dates back to the late Goryeo Dynasty (918–1392 AD), during a time when the Mongol Empire had expanded across much of Asia, the Middle East, and parts of Eastern Europe. Under the period known as Pax Mongolica, the Mongols introduced distillation techniques from Syria to the Korean Peninsula. Initially, soju was more commonly associated with the northern regions of Korea, where aspiring scholars and young nobles would travel to the capital to sit merit-based civil service examinations. These northerners often gathered in what is now the Gongdeok neighbourhood of modern-day Seoul. It was in this area that the wives of these officials began distilling and selling soju, helping to spread its popularity through Seoul’s society.
During the subsequent Joseon Dynasty (1392–1910), the government implemented bans on the commercial sale of alcohol in an attempt to promote public order and moral behaviour. However, this prohibition only pushed alcohol production underground. Soju became a form of home-brewed moonshine, produced in small batches using high-quality ingredients. This underground movement not only kept soju alive but also laid the groundwork for it to evolve into the much-loved drink we know today.
In 1910, Korea was annexed by Japan and became its first colony. During this occupation, Japan systematically worked to suppress Korean culture—eliminating traditional customs, banning the Korean language, and even forcing families to adopt Japanese surnames. As part of this cultural erasure, the Japanese authorities outlawed the production of soju and home brewing, leading to the loss of thousands of traditional recipes. This had a devastating impact on the Korean soju industry, with many family-based distilleries shutting down entirely. In response, some alcohol producers began crafting hybrid beverages that resembled makgeolli-sake, using Japanese koji mould instead of the traditional Korean nuruk fermentation starter.
Although commercial alcohol production was permitted under strict regulation, only Japanese-style drinks were allowed. This marked a significant shift, creating a clear divide between traditional soju and modern, Japanese-influenced variations. Korean breweries stopped using nuruk altogether and adopted koji to align with colonial standards.
Following Korea’s liberation in 1945, the country emerged deeply wounded, economically and socially fractured. The situation worsened during the Korean War (1950–1953), leaving the alcohol industry in a dire state. Traditional brewing knowledge had diminished, and the infrastructure needed to revive it was virtually non-existent.
Soju’s Comeback: How Korea Rebuilt Its National Drink
Soju today is generally classified into two main types: traditional distilled soju and commercial diluted soju. Traditional soju is made by fermenting rice with nuruk (a Korean fermentation starter) and then distilling it into a high-proof spirit. This method results in a rich, full-bodied drink with strong cultural ties. In contrast, the soju most commonly seen on supermarket shelves and in restaurants—typically housed in the iconic green bottles—is diluted soju. This modern version uses a base spirit derived from cheaper starch sources such as wheat, barley, sweet potatoes, or tapioca. The alcohol is produced as nearly pure ethanol (around 95%) and then diluted with water, sweeteners, and flavour additives to make it more palatable and cost-effective.
During the 1960s, the South Korean government implemented rice restrictions as part of its post-war economic recovery plan. Since rice was considered essential for food rather than alcohol production, distilling soju from rice was discouraged. As a result, companies pivoted to producing diluted soju, which was far cheaper and easier to manufacture. Around the same time, traditional makgeolli suffered in quality due to reliance on wheat and synthetic ingredients. In contrast, diluted soju, with its lower alcohol content and smoother taste, quickly rose in popularity and became a staple. These accessible green bottles soon dominated the market, overtaking the more traditional forms of soju in everyday Korean life.
How Soju Is Made: Traditional and Modern Production Methods
As with many other alcoholic beverages, the production of soju involves both fermentation and distillation. Traditionally, soju was made using rice, but modern versions often rely on alternative starches such as wheat, barley, tapioca, or sweet potatoes, as mentioned earlier. Here’s a brief overview of how this popular Korean spirit is made:
Fermentation
The chosen starches are first mixed with water and fermented using yeast and nuruk, a traditional Korean fermentation starter. This process converts the starches into sugars, which are then transformed into alcohol through natural fermentation. Nuruk plays a key role in developing the complex flavours unique to traditional soju.
Distillation
Once fermentation is complete, the mixture is distilled to separate the alcohol from the remaining solids and water. In traditional methods, this was done using clay or metal stills. Today, more modern distillation equipment ensures greater efficiency and consistency in extracting the alcohol, resulting in a clean and potent spirit.
Dilution and Flavouring
For commercial or mass-produced soju—like the ones in green bottles—the pure ethanol (often distilled from alternative starches) is diluted with water to lower the alcohol content, typically to between 16–20%. Sweeteners such as sugar or stevia are added to enhance flavour and create the smoother, slightly sweet profile that makes soju easy to drink. Some variations also include fruit flavours to appeal to younger or international markets.
This production process makes soju an adaptable and widely enjoyed beverage, perfect for pairing with a variety of Korean dishes or enjoyed simply on its own.
Why Soju Matters: Culture, Community, and Global Appeal
Soju, carries with it the deep essence of Korean culture, tradition, and resilience. From its early roots influenced by the Mongol Empire, through the Japanese occupation and rice restrictions, this humble rice wine has witnessed Korea’s most pivotal historical moments. Despite these challenges, it not only survived but evolved—crossing borders and gaining popularity around the world. Today, makgeolli and soju are both enjoyed across tables filled with food, laughter, and community, whether at a barbecue with friends or a quiet evening meal. These drinks represent more than just alcohol—they reflect Korea’s cultural spirit and ability to bring people together.
While we’re unable to sell alcohol online, you can browse our selection of authentic Korean soju in person at our Oriental Shop physical store. Come visit us and discover Korea’s iconic spirit for yourself—perfect for sharing over good food and great conversation. Cheers! 🥂
