Taste the Soul of Japan: Handcrafted Soy Sauce (Shoyu Sauce) Aged Over 500 Days, and Traditional Miso That Begins with Koji

Using Japanese techniques passed down since the 1800s, we brew soy sauce and miso in Yuasa, Wakayama—the birthplace of shoyu.

Our soy sauce (shoyu sauce) is patiently aged for over 500 days in cedar barrels, while our miso follows its own traditional fermentation timeline—guided by koji and craftsmanship, not speed.

 

A Tradition Handed Down Through Generations: Family Craftsmanship Since 1881 in Yuasa

Yuasa, Wakayama is widely known as the town where Japanese soy sauce was born.

In this quiet coastal town, our family-run brewery has continued crafting soy sauce and miso since 1881.

We do not chase scale. We protect the time, care, and responsibility that come with traditional brewing—batch by batch, year after year. That commitment has never changed.

 

Traditional Craft with Chinese Roots: From Kinzanji Miso to “Tamari”

Before soy sauce became a cornerstone of Japanese cuisine, its origins can be traced back to ancient China.

It is said that modern soy sauce emerged from “tamari”—the savory liquid that accumulated during the production of Kinzanji miso, which was brought from China to Kishu (present-day Wakayama) during the Kamakura period around 800 years ago.

By preserving the core techniques passed down for centuries, our brewery honors this cross-cultural heritage.

 

From Yuasa to All of Japan: A Technique Refined, Then Shared Nationwide

In Yuasa, the method of soy sauce brewing was refined and perfected.

Craftsmen from across Japan are said to have visited Yuasa to learn the technique, helping it spread nationwide and become a foundation of Japanese cuisine.

We continue to protect this tradition—not as a performance, but as a living craft rooted in the same spirit that built Yuasa’s legacy.

 

Only Natural Ingredients: Japanese Soybeans, Wheat, Salt, and Soft Water

We allow no compromise in ingredients.
We use only Japanese soybeans, wheat, salt, and soft water—nothing more.

No artificial flavorings. No unnecessary additives.
Just the power of raw ingredients and fermentation itself—exactly what true soy sauce should be.

 

Traditional Cedar-Barrel Soy Sauce: Aged Over 500 Days in Century-Old Wooden Barrels

Our handcrafted soy sauce is slowly matured for over 500 days in century-old cedar barrels.

Natural fermentation develops a rich aroma, deep umami, and a mellow roundness that only time can create—this is the signature of authentic shoyu sauce.

 

500 Days of Patience, One Spoonful of Perfection

Unlike factory-made soy sauce produced in just a few days, ours is brewed slowly—guided by living koji and patience.

The result is a naturally balanced flavor that brings complexity and softness to every dish, from sashimi to stews.

 

Traditionally Brewed Soy Sauce from Japan: Just Four Ingredients, No Artificial Flavors

We use only four ingredients and no artificial flavorings.

Pure, clean, and powerful—made to elevate the natural character of your food with real soy sauce depth.

 

Ideal for Vegetarian and Vegan Cooking

No animal-derived ingredients.

A perfect choice for plant-based chefs and home cooks who still demand uncompromising umami from their soy sauce.

 

Handcrafted in Small Batches: Intentionally Limited by Design

Quality takes time. Authenticity does too.

Our soy sauce is naturally fermented for over 500 days in wooden barrels, made with care in every batch.

Our miso is also traditionally crafted from koji and natural ingredients, following a fermentation period that suits its style and flavor—because miso’s best expression is achieved through balance, not a single fixed number of days.

Because these processes are slow and hands-on, production is intentionally limited.

We do not aim for mass production—we aim for perfection.

That is why every bottle of soy sauce is not just a product, but a rare experience for those who value true depth of flavor.

 

Miso That Nourishes and Delights

Our miso is more than a soup base.
It is a fermented food rich in flavor and tradition—often called a Japanese superfood.

Made from carefully cultivated koji and time-honored methods, our miso develops a deep, mellow taste that supports everyday cooking with warmth and complexity.

 

Authentic Japanese Miso for Export: Sweet Koji, Deep and Mellow Flavor

Our miso is available worldwide and handmade using traditional Japanese methods.

The secret lies in our koji: naturally sweet, it creates a deep, mellow taste with remarkable smoothness.

 

Buy Soy Sauce from Japan Online: Shipped Directly from Wakayama

Shipped directly from Wakayama to your kitchen—freshness and quality guaranteed.

👉 Shop our traditional soy sauce (shoyu sauce) and miso — direct from Japan

 

Bring the Spirit of Japanese Craft to Your Table

Flavor this deep takes time, care, and centuries of knowledge.

Whether you are a professional chef or a home cook, if you are seeking something real—something soulful—then you are exactly who we made this for.

Let your dishes tell a deeper story.

👉 Shop our traditional soy sauce and miso — direct from Japan