Koshu Valley is the country’s most renowned wine-producing region. It is the birthplace of Japanese winemaking and is particularly famous for its Koshu grape, a delicate, aromatic white variety that pairs beautifully with Japanese cuisine.

- **Primary Grape**: **Koshu (白葡萄, meaning "white grape")**

- Surrounded by mountains, creating a unique microclimate.

- Long growing season with mild temperatures, allowing for slow ripening.

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### **2. History & Winemaking Tradition**

- **Origins**: Winemaking in the Koshu Valley dates back over **1,300 years**, with the Koshu grape believed to have originated from **Silk Road** trade routes.

- **Modern Winemaking**:

- Western-style winemaking was introduced in the **late 19th century**.

- Today, the region produces wines with a focus on **purity, elegance, and minerality**.

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### **3. Key Grape Varieties & Wine Styles**

#### **Koshu (White Wine)**

- **Flavor Profile**:

- Light-bodied, delicate acidity.

- Notes of citrus (yuzu, grapefruit), white peach, floral aromas, and minerality.

- Subtle salinity, making it a perfect match for Japanese cuisine.

- **Styles**:

- **Still**: Crisp, dry, and refreshing.

- **Sparkling**: Increasingly popular, with fine bubbles and bright acidity.

- **Sur Lie**: Aged on lees for added texture and depth.

#### **Other Grapes & Styles**

- **Muscat Bailey A** (red) – A Japanese hybrid grape, producing soft, fruity reds.

- **Chardonnay** & **Merlot** – Gaining recognition for high-quality expressions.

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### **4. Notable Wineries**

- **Grace Wine** – One of Japan’s most internationally acclaimed wineries, known for elegant Koshu wines.

- **Château Mercian** – A pioneer in modern Japanese winemaking, producing both Koshu and Bordeaux-style reds.

- **Suntory Tomi No Oka Winery** – Known for Koshu and high-quality Chardonnay.

- **Lumière Winery** – Family-owned, with a focus on organic viticulture.

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### **5. Food Pairing & Serving**

- **Best Served At**: **8–10°C (46–50°F)**

- **Pairing Ideas**:

- **Sushi & Sashimi** – Koshu’s acidity and minerality complement fresh seafood.

- **Tempura** – Crisp, light texture enhances delicate fried flavors.

- **Yakitori (grilled chicken skewers)** – Especially with salt-seasoned styles.

- **Kaiseki Cuisine** – Koshu pairs harmoniously with refined, multi-course Japanese dining.

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### **6. Recognition & Global Presence**

- Koshu wines have gained **international recognition**, with exports increasing to Europe and the U.S.

- **Koshu of Japan (KOJ) Organization** promotes the grape worldwide.

- Japan’s wines, especially from Koshu Valley, are now served in **Michelin-starred restaurants** globally.