Shochu vs Soju: Japan and Korea's Favourite Spirits
Two closely related yet distinctly different spirits dominate drinking culture across East Asia, yet outside the region they are often confused, conflated, or reduced to the single characterisation of being the local alcohol. Shochu is Japanese; soju is Korean. Both are distilled spirits made from starchy or sugary raw materials, typically consumed at low-to-moderate alcohol content, deeply embedded in their respective food cultures, and among the most consumed spirits in the world by volume — not just in Asia, but globally. Soju routinely appears at the top of global spirits sales rankings by unit volume, a fact that surprises drinkers accustomed to thinking of Scotch or bourbon as major categories.
The historical relationship between the two spirits involves medieval cultural exchange along trading routes between the Korean peninsula and Kyushu, Japan's southernmost main island, where shochu production is most concentrated. Both share roots in the distillation technologies that spread from Arabia through the Silk Road and reached East Asia via China. But the two traditions have diverged significantly over centuries, producing spirits with different raw materials, different production philosophies, and quite different contemporary market positions.
Shochu: Japan's Diverse Distilled Spirit
Shochu is a Japanese distilled spirit that can be produced from a wide range of raw materials: sweet potato (imo), barley (mugi), rice (kome), buckwheat (soba), sugar cane (kokuto), chestnut, and several other sources. Each raw material produces a distinct flavour profile, making shochu one of the most diverse spirits categories in the world despite its relative obscurity outside Japan.
The most important distinction in shochu production is between honkaku shochu (authentic shochu, also called otsu rui or category B) and korui shochu (multiple-distillation shochu, category A). Honkaku shochu is produced by single distillation using a pot still from a single raw material, and it retains the distinctive flavour character of that material — imo shochu from Kagoshima has a pronounced sweet potato earthiness; mugi shochu from Oita is lighter, nuttier, more cereal-like. Korui shochu is produced by continuous column distillation to high purity and is closer to neutral spirit, used primarily as a base for mixed drinks and canned cocktails.
Honkaku shochu is the tradition that commands serious attention among enthusiasts. The Kyushu island of Kagoshima is the heartland of imo shochu, where dozens of small distilleries produce from locally grown Koiki sweet potatoes using koji mould (Aspergillus kawachii) to saccharify the starch. Koji fermentation is fundamental to Japanese shochu production as it is to sake — the mould produces enzymes that break down starch into fermentable sugars before yeast converts them to alcohol.
Imo, Mugi, and Kokuto: The Major Styles
Sweet potato shochu (imo jochu) from Kagoshima is the most distinctive and most debated style. Fresh sweet potatoes are used directly in fermentation — not dried or mashed — and the resulting spirit has an earthy, almost funky character that can be polarising on first encounter. The aroma of imo shochu is complex and hard to categorise: cooked potato, tropical fruit, earth, sometimes a quality that drinkers describe as mellow or even musky. At 25 percent ABV — the standard Japanese serving strength — it is drunk warm in winter (oyuwari, with hot water) or over ice and cold water in summer (mizuwari), and the warmth transforms the character significantly, releasing aromatics that are less apparent at room temperature.
Barley shochu (mugi jochu) is produced across Kyushu, with Oita prefecture and the island of Iki particularly noted for the style. Mugi shochu is lighter and more cereal-forward than imo, with a clean, slightly nutty character that is easier for non-specialists to approach. Iichiko, one of Japan's most widely sold barley shochu brands, has achieved significant market share internationally by targeting consumers who want the shochu experience without the strong agricultural character of imo.
Kokuto shochu — black sugar shochu — is produced only on the Amami Islands southwest of Kagoshima, the only region where the raw material and production rules coincide to permit this style. It uses Okinawan black sugar as the fermentable base, producing a spirit with more obvious sweetness and a character that bridges between shochu and rum.
Soju: Korea's National Spirit
Korean soju bears a historical relationship to Japanese shochu — the word soju is the Korean reading of the same Chinese characters used for shochu, reflecting shared linguistic heritage — but the modern products are quite different. Contemporary soju sold in the diluted-spirits market, particularly the well-known green-bottled brands like Jinro (Chamisul), Lotte Chilsung's Chum Churum, and HiteJinro, is produced from neutral spirit — typically derived from tapioca (cassava), sweet potato, or grain — that is rectified to near purity and then diluted with water and added sweeteners to around 16 to 25 percent ABV.
This diluted-style soju is extremely approachable, often described as tasting of nothing — or very little — which makes it a neutral accompaniment to the assertive flavours of Korean cuisine. Samgyeopsal (grilled pork belly), galbi (beef short ribs), and the range of spicy fermented accompaniments on a Korean table are intense enough that a strongly flavoured spirit would compete rather than complement. The near-neutrality of mass-market soju makes it a food-compatible spirit in the same way that very dry sake serves Japanese cuisine.
The category has also developed flavoured extensions — Jinro produces fruit-flavoured soju in grapefruit, peach, strawberry, and other varieties at around 13 percent ABV — that have become enormously popular in Korea and increasingly in export markets, particularly the United States and Australia where Korean cultural exports have driven interest in Korean food and drink.
Andong Soju: The Traditional Version
The traditional category of Korean soju — distilled from grain using pot stills without subsequent dilution or sweetener addition — exists but is distinct from the mass-market product. Andong Soju, produced in North Gyeongsang Province using traditional methods from rice and malted barley, is considered the representative of authentic Korean distilled soju. Bottled at around 45 percent ABV, it has a clean grain character, gentle sweetness, and a finish that reflects the rice base — quite different from Japanese shochu despite being produced by comparable methods.
Andong Soju received Korean intangible cultural heritage status and has recently attracted international interest among spirits collectors and enthusiasts interested in traditional Asian distillation. It serves as a reminder that the global-selling diluted green-bottle product represents a twentieth-century industrialisation of a much older and more complex distilling tradition.
Serving and Food Culture
Both shochu and soju are fundamentally dining spirits rather than sipping spirits in the Western sense. In Japan, izakayas serve shochu throughout a meal, pairing warm sweet potato expressions with grilled and fried dishes and cooler barley expressions with lighter preparations. The water-diluted format (mizuwari or oyuwari) reduces alcohol content to comfortable dining levels while extending the flavour of the spirit through the meal.
In Korea, the soju ritual includes specific pouring protocols: you do not pour your own glass, you receive and offer with two hands, you accept the refill offered by your tablemate without refusing — social customs that embed the spirit in relationships between diners rather than in solitary consumption.
Explore shochu distilleries in Kyushu and producers across Japan and Korea on the distillery world map, which covers Asian spirits alongside the global distilling landscape.