Step 1 : Introduction to the question "In which country is soju the most popular distilled spirit?"
...The most popular liquor in South Korea is soju, a clear, distilled, low-alcohol spirit. South Koreans drink, on average, 13.7 shots of soju per week. Soju is traditionally made from a blend of grains and rice. During times when rice is in short supply, other starches, such as wheat or sweet potatoes, are acceptable substitutes. Soju is usually drunk from a small glass. The alcohol content puts in on a scale somewhere between wine and harder drinks such as gin or whiskey. It is often used as a substitute for vodka in cocktails. Source: TownAndCountryMag.com