Koshu sparkling wine at MGVs and Aruga Branca, including Brilhante served in Riedel Koshu glasses overlooking the Katsunuma vineyards.
Koshu sparkling wine is one of Yamanashi’s most distinctive wine styles. Made wholly or partly from Japan’s Koshu grape, it combines the variety’s natural freshness with bubbles that can range from lively and fruit-driven to fine, dry and complex.
Quick answer: Koshu sparkling wine is Japanese sparkling wine made with Koshu grapes, usually from Yamanashi. Its bright acidity, restrained fruit and citrus character make it especially well suited to sparkling wine, but the bottles are not all made in the same way. Some use secondary fermentation in the bottle, others use the Charmat or tank method, and some releases use carbonation.
I have lived and guided wine tours in Yamanashi’s Koshu Valley for more than a decade. Koshu sparkling is one of the wines that most consistently surprises my guests. Many arrive knowing Japanese whisky or sake but have never tasted a serious Japanese sparkling wine. A well-made Koshu sparkling often changes that perception in the first glass.
Why Koshu Works So Well as a Sparkling Wine
Koshu is a late-ripening, pale pink-skinned grape associated above all with Yamanashi. It usually produces a lightly colored wine with fresh acidity, subtle fruit and a clean finish. Those qualities give a winemaker a strong base for sparkling wine.
The bubbles lift Koshu’s delicate aromas rather than overpowering them. Citrus, grapefruit, green apple and gentle floral notes are common impressions, while some wines show a mineral or slightly savory edge. The grape’s natural freshness also helps the wine remain lively when served cold, which is one reason Koshu sparkling is especially enjoyable during Yamanashi’s hot summers.
Koshu sparkling should not be treated as one fixed style or as a simple Japanese copy of Cava or Prosecco. The result depends on the vineyard, grape composition, harvest timing, fermentation method, dosage, lees aging and the producer’s own approach. Some bottles are immediate and fruit-focused; others are structured, dry and capable of developing more complexity.
Three Main Ways Koshu Sparkling Wine Is Made
Traditional Bottle Fermentation
With the traditional method, the second fermentation takes place inside the bottle. The wine may then remain in contact with the lees before riddling and disgorgement. This approach can produce finer, more integrated bubbles and can add texture, depth and subtle yeasty or bready notes.
Charmat or Tank Fermentation
With the Charmat method, the second fermentation takes place in a sealed pressure tank. This often preserves more of Koshu’s fresh grape, citrus and orchard-fruit character. It can produce a clean, lively sparkling wine that works well as an aperitif or with a meal.
Carbonation
Some sparkling wines are made by adding carbon dioxide to a finished still wine. This can create a direct, refreshing style, but it should not be confused with bottle or tank secondary fermentation. The method should be checked for each bottle rather than assumed from the words “Koshu sparkling.”
Eight Yamanashi Producers to Know
These are not presented as a ranking. They show how differently Yamanashi producers interpret Koshu and Japanese sparkling wine. Specific vintages, tasting availability and sales can change, so visitors should not plan around one bottle without checking first.
Kizan Sparkling Traditional Brut
Kizan Winery in Enzan makes its Sparkling Traditional Brut from 100% Koshu using secondary fermentation in the bottle. It is a dry, traditional-method expression that keeps the grape itself at the center of the wine. Kizan is one of my personal favorites because the wine is precise and refreshing without losing Koshu’s quiet fruit character.
Grace Serena Extra Brut
Grace Wine’s Serena Extra Brut is an important comparison because it is not made from Koshu alone. It combines Koshu and Chardonnay from Yamanashi, undergoes secondary fermentation in the bottle and receives extended bottle aging. The current 2020 release was aged for 48 months before disgorgement. The result is a very dry, carefully made Japanese sparkling wine with greater depth and creaminess than many lighter Koshu-only styles.
Grace is another of my favorites. It shows how Koshu can contribute freshness and regional identity while Chardonnay adds body and structure. Serena Extra Brut is also difficult to obtain. In my experience it is frequently sold out, so finding it available by the bottle or as a tasting is a special opportunity rather than something visitors should expect.
Katsunuma Jyozo Aruga Branca Brilhante
Katsunuma Jyozo is the winery; Aruga Branca is its Koshu-focused brand. Aruga Branca Brilhante is a dry, bottle-fermented sparkling wine made from Koshu. It has long been one of the Yamanashi sparkling wines I most enjoy introducing to guests.
When Katsunuma Jyozo is one of the final stops, guests sometimes have the chance to taste Aruga Branca Brilhante in a Riedel Champagne Wine Glass/Koshu. Compared with an extremely narrow flute, the bowl gives the wine more room to show its citrus aroma, texture and fine bubbles. Guests are often pleasantly surprised by how refined and complete a Japanese sparkling wine can be when it is well chilled and served in the appropriate glass.
The winery also sells Riedel Koshu glasses, subject to availability. The local story I have been told is that Mr. Aruga and Mr. Riedel were long-time friends, and that their relationship helped begin the collaboration around a glass suited to Koshu. Riedel later released a Koshu-specific glass selected together with Japanese Koshu producers. This connection between producer, grape and glass is part of what makes a Brilhante tasting at the winery memorable.
Yozo Vineyards NOA Koshu Sparkling Extra Brut
Another excellent example is NOA Koshu Sparkling Extra Brut from Yozo Vineyards in Kofu. It is made entirely from Koshu grown in the winery’s own Yamanashi vineyard. Low-temperature fermentation is used to draw out the grape’s fruit and acidity, and the wine is finished Extra Brut, giving it a clean, dry profile with bright citrus character.
NOA is a useful addition to this guide because it shows the freshness and precision that Koshu can achieve in a modern Yamanashi sparkling wine. I find it especially appealing as an aperitif and with delicate Japanese food, seafood, salads and vegetable dishes. The winery does not state the secondary-fermentation method in its current public description, so it should be appreciated for its taste and balance without assuming how the bubbles were produced.
MGVs K537 GI Yamanashi N.V. POSH
MGVs approaches winemaking in a highly systematic way, and its product codes explain the grape, origin, juice preparation and production method. In K537, “K” identifies Koshu, “5” indicates GI Yamanashi, “3” refers to a combination of free-run and pressed juice, and “7” identifies secondary fermentation in tank.
K537 is made from 100% Koshu using the Charmat method. It is dry, smooth and refreshing, with the citrus-led character of the grape kept clear. MGVs also produces bottle-fermented POSH wines, making the winery particularly useful for comparing how production method changes the same grape. I consider MGVs an excellent producer and a strong introduction to modern Koshu sparkling.
At the winery, K537 is displayed with medals from the Texas International Wine Competition, including a 2023 Gold ribbon. It also received Gold at the Berliner Wine Trophy 2023. Awards are not the reason I recommend a wine, but they show that this modern Yamanashi sparkling has earned recognition well beyond the region.
Manns Wine Kobo no Awa Koshu
Manns Wine produces one of Yamanashi’s broadest and most approachable ranges of sparkling wines from Japanese grape varieties. Koshu is central to its Kobo no Awa series, which includes a standard Koshu, a dry Koshu Brut and a softer Demi-Sec style.
The wines use the Charmat method, with secondary fermentation in pressure tanks. Manns chose this method to retain the grape’s fresh aroma and delicate character. The Koshu Brut is crisp and dry, while the wider range allows drinkers to compare different sweetness levels without leaving the same grape family.
Sasaichi OLIFANT Koshu Bottle-Fermented Sparkling
Sasaichi Shuzo is best known as a Yamanashi sake brewery with more than 350 years of history, but its OLIFANT wine brand dates to 1953. OLIFANT Koshu Bottle-Fermented Sparkling brings the brewery’s fermentation experience together with Yamanashi’s wine tradition and uses secondary fermentation in the bottle.
The wine received Gold in the sparkling category at the Sakura Awards 2023. It is a useful traditional-method comparison with the Charmat-method Koshu wines from MGVs and Manns, and another example of how differently producers can interpret the same Yamanashi grape.
Kisvin Koshu Sparkling
Kisvin produces Koshu sparkling in limited releases. Recent winery descriptions have emphasized pear and citrus aromas, delicate bubbles and umami. Availability can be irregular, and some vintages sell out or are not released, so it is better treated as a wine to discover when available rather than a guaranteed winery tasting.
Kisvin adds another useful perspective to the category: Koshu sparkling can be serious and carefully made without needing to imitate a European regional style.
Beyond Koshu: Haramo Black Queen Sparkling Red
Haramo Black Queen Sparkling Red is not a Koshu wine, so it sits outside the main list above. It is included because it shows the wider range of sparkling wine being made in Yamanashi. Haramo describes it as the winery’s first sparkling wine, made from 2023 Yamanashi-grown Black Queen and finished as a refreshing red sparkling style.
In my experience, this is a rare bottle with limited and unpredictable availability. Visitors should not expect it to be open for tasting, but finding it provides an unusual chance to compare the pale, citrus-led character of Koshu sparkling with a fruitier Japanese red sparkling wine.
Morey’s Tasting Note
In my experience, Koshu sparkling wine is fruity but dry, with bright acidity and a clean mineral character. I often notice citrus and grapefruit, with a slight green-apple flavor. The best examples are well balanced, allowing the differences between vineyards and each winery’s approach to come through.
The exact balance changes from bottle to bottle. A Charmat-method wine may emphasize fresh fruit and immediacy, while a traditional-method wine can show finer bubbles, more texture and greater depth. Koshu itself remains subtle, so careful winemaking is easier to notice than it might be in a strongly aromatic grape.
How to Serve Koshu Sparkling Wine
Koshu sparkling is usually best served well chilled. Fresher, fruit-driven bottles are particularly refreshing in warm weather, while more complex bottle-aged examples can be allowed to warm slightly in the glass so their texture and aroma become clearer.
A narrow flute will preserve the visual stream of bubbles, but a wine glass with a little more bowl space can reveal more aroma and texture. For a serious traditional-method Koshu sparkling, I prefer a glass that allows the wine to open rather than an extremely narrow flute.
Food Pairings
Koshu sparkling is excellent on its own, as an aperitif or at the start of a meal. Its acidity and restrained fruit also make it one of the easiest Japanese wines to pair with lighter food.
- Seafood, sashimi and sushi
- Salads and vegetable dishes
- Japanese grilled vegetables
- Tempura and lightly salted fried dishes
- Grilled fish or chicken seasoned simply with salt
- Carpaccio, caprese and other light appetizers
For me, seafood and salads are especially dependable pairings. The wine refreshes the palate without covering delicate ingredients, while the citrus and mineral qualities can echo lemon, salt and fresh vegetables.
How to Choose a Bottle
When comparing Koshu sparkling wines, check five things:
- Grape composition: Is it 100% Koshu, or is Koshu blended with Chardonnay or another grape?
- Production method: Was the second fermentation completed in the bottle or in a tank, or was the wine carbonated?
- Sweetness: Brut and Extra Brut are dry, while other cuvées may be softer or noticeably sweeter.
- Aging: Extended lees or bottle aging can add texture and complexity.
- Purpose: Decide whether you want a light summer aperitif, a food wine or a more complex bottle for a special meal.
Tasting Koshu Sparkling Wine in Yamanashi
Yamanashi wine country is the best place to compare Koshu sparkling at its source, but availability changes constantly. Limited bottles sell out, tasting menus change, and some wineries require reservations or do not open every wine each day.
That is why a useful winery day should be built around the best current opportunities rather than a rigid promise to visit a particular producer or taste one exact bottle. During a private Yamanashi wine tour from Tokyo, sparkling wine can be included when suitable wines and appointments are available.
All Winery Tours Japan experiences are personally guided by Morey, a Bilingual English-Speaking Local Guide who has lived in the Koshu Valley for more than a decade and has built long-standing relationships with winery owners, winemakers and residents throughout the valley.
Frequently Asked Questions
Is Koshu sparkling wine always made from 100% Koshu?
No. Many bottles are 100% Koshu, but some Japanese sparkling wines combine Koshu with Chardonnay or another grape. Grace Serena Extra Brut is a clear example of a Koshu and Chardonnay blend.
Is all Koshu sparkling wine made by the traditional method?
No. Yamanashi producers use bottle secondary fermentation, Charmat or tank fermentation, and carbonation. The production method should be checked for each wine.
Is Koshu sparkling wine dry?
Many well-known examples are dry, including Brut and Extra Brut wines, but sweeter and softer styles also exist. Manns Wine, for example, produces several Koshu sparkling styles with different sweetness levels.
What food goes with Koshu sparkling wine?
Seafood, sushi, sashimi, salads, tempura, grilled vegetables and lightly seasoned dishes are reliable choices. The best pairing depends on the wine’s dryness, weight and production method.
A Japanese Sparkling Wine Worth Discovering
Koshu sparkling wine deserves to be understood as a category of its own. It can be light and immediate or dry, fine-bubbled and complex. The strongest examples keep Koshu’s citrus, mineral and green-fruit character while showing the clear influence of vineyard, method and producer.
For visitors to Yamanashi, it is also one of the most enjoyable ways to understand how far Japanese wine has developed. A glass of well-chilled Koshu sparkling is refreshing at any time, but it is especially memorable in summer, served close to the vineyards and wineries where the grape is grown.