Awamori is a distilled spirit indigenous to Okinawa, Japan, with a history spanning over 600 years. It is made exclusively from Thai indica rice and black koji mold (Aspergillus luchuensis), using a unique all-koji fermentation method. Legally classified as a type of shochu, awamori has its own distinct production process, cultural significance, and GI (Geographical Indication) designation as 'Ryukyu.' It typically ranges from 25% to 43% ABV.

What is kusu (aged awamori)?

Kusu is awamori that has been aged for three or more years. The aging is traditionally done in clay pots (kame), which allow subtle oxidation and mineral exchange that mellows the spirit and develops complex flavors of vanilla, caramel, dried fruit, and spice. Before the Battle of Okinawa in 1945, families maintained kusu collections spanning generations, with some pots said to contain awamori aged 200-300 years. The tradition of adding new awamori to older stocks (shitsugi) ensures the blend always contains a core of very old spirit.

Why does awamori use Thai rice instead of Japanese rice?

Awamori uses Thai indica rice (long-grain) for both historical and practical reasons. Okinawa's trade relationship with Southeast Asia, particularly the Ryukyu Kingdom's role as a maritime trading hub, established Thai rice as the traditional ingredient. Practically, indica rice's long, dry grains are ideal for koji cultivation — they do not clump together like short-grain Japanese rice, allowing the black koji mold to penetrate each grain more thoroughly and produce better fermentation.

Deep Dive

Awamori: The Complete Guide to Okinawa's 600-Year-Old Spirit

Q: What is the difference between awamori and shochu?

While awamori is legally classified as shochu, three key differences set it apart. First, awamori uses Thai indica rice (long-grain) instead of Japanese short-grain rice or other ingredients. Second, awamori uses only black koji (Aspergillus luchuensis), while mainland shochu uses black, white, or yellow koji. Third, awamori uses an all-koji method (zenryo-koji) where all the rice is made into koji and fermented in a single stage, while mainland shochu uses a two-stage fermentation process.

Q: How do you drink awamori?

The most traditional way is with water and ice (mizuwari), typically at a 6:4 ratio of water to awamori. On the rocks is also popular, especially for aged kusu. Straight (sutoreeto) is common for premium aged awamori, served at room temperature in a small cup. In Okinawa, awamori cocktails are increasingly popular, and some bars serve it with shikuwasa (Okinawan citrus) juice. For kusu aged 10+ years, drink it straight to appreciate the complexity.

Q: How long can awamori be aged?

There is no upper limit to awamori aging, and it continues to improve with time. While the official 'kusu' designation requires a minimum of three years, many premium awamori are aged 10, 15, 20, or even 25+ years. Before World War II, some Okinawan families maintained awamori collections aged over 200 years through the shitsugi (topping up) tradition. Sadly, nearly all pre-war kusu was destroyed during the Battle of Okinawa in 1945. Today, the oldest commercially available kusu is typically 20-30 years old.

Updated March 2026 · 12 min read

Before there was sake as we know it, before shochu spread across Kyushu, before Japanese whisky was even a dream — there was awamori.

Okinawa's indigenous spirit has been distilled continuously for over 600 years, making it the oldest distilled spirit in Japan and one of the oldest in all of East Asia. It predates the establishment of most European distilling traditions. Yet outside Okinawa, and certainly outside Japan, awamori remains one of the least known quality spirits in the world.

That is a shame, because awamori — particularly aged awamori, called kusu — is one of the most fascinating and rewarding spirits you can drink. This is the complete guide.

600 Years of History

Awamori's origins are inseparable from the history of the Ryukyu Kingdom, the independent maritime state that ruled the chain of islands between Japan and Taiwan from the 15th to the 19th century. The Ryukyu Kingdom was one of the great trading hubs of East Asia, maintaining diplomatic and commercial relationships with China, Japan, Korea, and Southeast Asia.

Distillation technology likely reached Okinawa from Siam (Thailand) in the 15th century, brought by traders or possibly learned by Okinawan sailors and merchants during their voyages. The earliest written records of awamori date to the late 1400s, and by the 1500s, it was already an established part of Okinawan culture — served at court, used in ceremonies, and traded as a diplomatic gift.

The word "awamori" itself has debated origins. One theory links it to "awa" (foam) and "mori" (rising), referring to the way bubbles form when the distilled spirit flows — the size of the bubbles was traditionally used to gauge alcohol content. Another theory connects it to "awa" (millet), suggesting an even older origin when millet may have been used as a base ingredient.

The Ryukyu royal court and awamori

Under the Ryukyu Kingdom, awamori production was tightly regulated. Only licensed distillers in the Shuri district (near the royal castle in Naha) were permitted to make it. The royal court maintained extensive kusu collections, with some clay pots said to hold awamori aged for a century or more. Awamori was considered a treasure — offered to Chinese envoys, presented as tribute to Japan's Satsuma domain, and served at the highest state occasions.

The tragedy of 1945

The Battle of Okinawa in 1945 was one of the deadliest engagements of World War II, and its impact on awamori culture was devastating. The bombardment of Shuri and Naha destroyed virtually every kusu collection on the island. Centuries of aged awamori — some reportedly dating back 200-300 years — were lost in days. When Okinawan distillers rebuilt after the war, they had to start from zero. Every bottle of kusu being produced today traces its lineage to the post-1945 restart.

Modern era

Okinawa reverted from American to Japanese administration in 1972, and awamori was incorporated into Japan's liquor tax system. In 1995, awamori received GI (Geographical Indication) protection as "Ryukyu," recognizing it as a unique product of Okinawa. Today, approximately 48 distilleries (sakagura or sakumotoya) operate across Okinawa Prefecture, from the main island to the remote Yaeyama and Miyako island groups.

How Awamori Is Made

Awamori's production process has three distinctive features that separate it from all other Japanese spirits.

1. Thai indica rice (long-grain)

While mainland shochu uses Japanese short-grain rice (or other base ingredients), awamori uses exclusively Thai indica rice — specifically, crushed or broken grains imported from Thailand. The long, dry grains do not stick together, allowing black koji mold to penetrate each grain more thoroughly than it could with sticky Japanese rice. This thorough koji penetration is essential to awamori's fermentation and flavor development.

The choice of Thai rice is not merely traditional. Okinawan distillers have experimented with Japanese rice, and the consensus is that indica rice produces a more complex and characteristically "awamori" spirit. The historical trade connection with Thailand established a tradition that turns out to be technically superior for this specific purpose.

2. Black koji (Aspergillus luchuensis)

Awamori uses exclusively black koji, the same mold that was later adopted by some mainland shochu producers. Black koji is actually native to Okinawa — it was first identified and classified from Okinawan awamori production. The scientific name, Aspergillus luchuensis, references "Luchu" (an old romanization of Ryukyu).

Black koji produces large amounts of citric acid during its growth phase. This citric acid serves as a natural preservative, protecting the fermentation from bacterial contamination in Okinawa's subtropical climate, where temperatures and humidity would quickly spoil a fermentation relying on the gentler yellow koji used in sake.

3. All-koji fermentation (zenryo-koji shikomi)

This is the most significant technical difference between awamori and mainland shochu. In mainland shochu production, there are two fermentation stages: a first stage using koji rice, and a second stage where the main ingredient (sweet potato, barley, etc.) is added. In awamori, all of the rice is made into koji, and it goes into the fermentation tank in a single stage.

This all-koji method means that the entire fermentable substrate has already been processed by black koji before yeast is added. The result is a more intense, more koji-driven flavor profile and a higher concentration of the flavor compounds that define awamori's distinctive character.

The distillation

Awamori is single-distilled in a pot still, like honkaku shochu. The raw distillate (hanazake) can be as high as 60-70% ABV. This is then diluted with water and aged, or diluted to the final bottling strength (typically 25-43% ABV).

Awamori vs Mainland Shochu

Aspect	Awamori	Mainland Shochu
Base ingredient	Thai indica rice (always)	Sweet potato, barley, rice, brown sugar, etc.
Koji	Black koji only	Black, white, or yellow koji
Fermentation	Single-stage, all-koji	Two-stage (koji + main ingredient)
Typical ABV	25-43%	25%
Aging tradition	Strong (kusu culture)	Moderate (some aging, less emphasis)
GI designation	Ryukyu (1995)	Satsuma, Kuma, Iki
Cultural identity	Ryukyu/Okinawan	Kyushu/Japanese mainland

Kusu: The Art of Aging

If there is one thing that elevates awamori from an interesting regional spirit to a world-class beverage, it is kusu — the tradition of aging awamori in clay pots.

Kusu (also written "koshu") simply means "old liquor." Under current regulations, awamori must be aged for a minimum of three years to carry the kusu designation. But the tradition goes far deeper than the legal minimum.

How kusu is aged

Traditional kusu aging uses large clay pots (kame) with unglazed interiors. The porous clay allows trace amounts of oxygen to interact with the spirit — a much slower and gentler oxidation than barrel aging. The clay itself contributes mineral elements. Over years and decades, this combination of micro-oxidation and mineral exchange produces profound changes in the spirit's character.

Young awamori is bold, sometimes sharp, with prominent koji-derived funk and rice character. After three years, it becomes noticeably smoother. After five to ten years, vanilla, caramel, and dried fruit notes emerge. After fifteen to twenty years, the spirit develops an extraordinary depth — layered, complex, with a finish that lingers for minutes.

The shitsugi tradition

The traditional kusu management system, called shitsugi, works like a solera. Multiple clay pots of different ages are maintained. When awamori is drawn from the oldest pot, that pot is topped up from the next oldest, and so on down the line, with the youngest pot receiving fresh distillate. This ensures that the drawn spirit always contains a percentage of the oldest awamori in the system, while the constant blending creates complexity that no single-vintage aging can match.

Before 1945, Okinawan families maintained shitsugi collections as heirlooms, with some systems said to contain awamori dating back generations. The destruction of these collections during the Battle of Okinawa represents an irreplaceable cultural loss.

The 100-year kusu project

Several Okinawan distilleries have begun 100-year kusu projects — laying down awamori in clay pots that will not be opened for a century, recreating the pre-war kusu tradition for future generations. These are acts of cultural preservation as much as distilling ambition.

How to Drink Awamori

Standard awamori (25-30% ABV)

Mizuwari (with water): The most common serving style in Okinawa. A 6:4 ratio of water to awamori (note: more water than spirit) produces a light, sessionable drink. Add ice for warm weather.
Rokku (on the rocks): Lets you taste more of the spirit's character as it slowly dilutes. Good for 30% ABV awamori.
Sodawari (with soda): Increasingly popular, especially with younger drinkers. The carbonation lifts awamori's aromatics beautifully.
With shikuwasa: Okinawan citrus (Citrus depressa) juice is a natural partner — squeeze fresh shikuwasa into your awamori and soda for an authentic Okinawan highball.

Kusu (aged awamori, 30-43% ABV)

Straight (sutoreeto): Premium kusu deserves to be tasted neat, at room temperature, in a small glass or clay cup. Sip slowly and let each mouthful open up.
With a splash of water: A few drops of water can open up the aromatics of a concentrated kusu. Do not drown it — just a splash.
On the rocks: Acceptable for 30% kusu, but for a 43% 10-year kusu, you may be diluting away the complexity you are paying for.

Food pairings

Awamori is a natural partner for Okinawan cuisine:

Rafute (braised pork belly) — the classic pairing. Awamori's bold character cuts through the richness.
Goya champuru (bitter melon stir-fry) — awamori's bitterness complements the dish's bitterness in a harmonious way.
Umibudo (sea grapes) — the briny pop against awamori's earthiness is sublime.
Tofuyo (fermented tofu) — an intensely flavored Okinawan delicacy that matches awamori's intensity.
Aged cheese — Parmesan, aged cheddar, and blue cheese all pair beautifully with kusu.

Notable Distilleries

Zuisen Shuzo (Naha)

One of the most prestigious awamori houses, known for their kusu program. Their 10-year and 15-year aged awamori are among the finest spirits produced in Japan. Located in Shuri, the former royal district, giving them a direct link to awamori's courtly heritage.

Higa Shuzo (Nago)

Producers of the popular Zanpa brand, available in several expressions from 25% to 43% ABV. Zanpa Black (30%) is an excellent introduction to awamori's character, and their aged expressions show the potential of kusu aging.

Kumesen Shuzo (Naha)

One of Okinawa's largest producers, best known for "Kumesen" and the premium "Zanpa" brand. They operate a large-scale kusu aging program with thousands of clay pots. Their 8-year and 12-year kusu offerings provide accessible entry points to aged awamori at reasonable prices.

Helios Shuzo (Nago)

A versatile producer making awamori, beer, and rum. Their "Shurei" brand is widely available and consistently good. Helios also operates a distillery tour and tasting room that is among the most visitor-friendly in Okinawa.

Chuko Shuzo (Miyako Island)

The representative distillery of Miyako Island, a remote island with its own awamori character. Miyako awamori tends to be slightly lighter and more mineral-driven than Okinawa main island styles, reflecting the island's coral limestone geology and distinct water.

Visiting Okinawa's Distilleries

Okinawa has approximately 48 awamori distilleries, and several welcome visitors. Unlike mainland sake breweries, which are often clustered in walkable districts, Okinawan distilleries are spread across the islands, so a car or taxi is usually necessary.

Best visitor experiences

Helios Shuzo (Nago): The most tourist-friendly, with a dedicated visitor center, English signage, and regular tours.
Zuisen Shuzo (Shuri, Naha): Historic location near Shuri Castle, with a small museum and tasting room.
Awamori-kan (Naha): Not a distillery but a museum and tasting bar in central Naha that covers all of Okinawa's awamori producers. An excellent first stop to orient yourself before visiting individual distilleries.

When to visit

Okinawa's subtropical climate means distilleries operate year-round (unlike mainland breweries that only brew in winter). Spring and autumn offer the most comfortable weather for touring. Some distilleries hold events during Okinawa's traditional festivals.

Explore all 48 Okinawan distilleries and beyond

Browse Okinawa Distilleries on Terroir HUB

Frequently Asked Questions

What is awamori?

Awamori is a distilled spirit from Okinawa, Japan, with over 600 years of history. Made from Thai indica rice and black koji mold using an all-koji fermentation method, it is Japan's oldest distilled spirit. It holds GI protection as "Ryukyu" and typically ranges from 25-43% ABV.

What is the difference between awamori and shochu?

Three key differences: awamori uses Thai indica rice (not Japanese rice or other ingredients), exclusively black koji (not white or yellow), and an all-koji single-stage fermentation (not the two-stage process used in mainland shochu).

What is kusu?

Kusu is awamori aged for three or more years, traditionally in clay pots. Aging develops complex flavors of vanilla, caramel, dried fruit, and spice. The shitsugi tradition (similar to a solera system) blends different ages for complexity. Pre-war collections were destroyed in 1945.

How do you drink awamori?

Standard awamori is most commonly mixed with water and ice (mizuwari, 6:4 water to spirit), on the rocks, or with soda. Premium kusu is best sipped straight at room temperature to appreciate its complexity.

Why does awamori use Thai rice?

Historical trade connections between the Ryukyu Kingdom and Siam established the tradition. Thai indica rice's long, dry grains are also technically superior for black koji cultivation, allowing more thorough penetration than sticky Japanese rice.

How long can awamori be aged?

There is no upper limit. The kusu designation requires a minimum of three years, but awamori aged 10, 15, 20, and 25+ years is commercially available. Pre-war collections were said to hold awamori aged over 200 years. Several distilleries have begun 100-year aging projects.