The Secret of Muroto Deep Ocean Water — Why We Use It in Our Skincare

The Secret of Muroto Deep Ocean Water — Why We Use It in Our Skincare

In the tranquil coastal town of Muroto, nestled in Kochi Prefecture, lies one of Japan’s most remarkable natural treasures: Deep Ocean Water (海洋深層水 – Kaiyō Shinsōsui).
At Yukari, we believe that true beauty begins with purity, balance, and depth — a philosophy that guides everything we create.
This is why we’ve chosen to infuse our skincare with Muroto’s deep ocean water — a gift from nature that carries both strength and serenity.

1. Water That Does More Than “Be Water”

In the world of skincare, we often talk about “active ingredients” — ceramides, vitamins, hyaluronic acid — but the silent hero behind their effectiveness is the water that carries them.
The quality of this water matters profoundly. It is not merely a base; it is the foundation that determines how each ingredient interacts with your skin.
(Source: TSUKURU COSME)

The water used in our formulas is drawn from approximately 344 meters below the surface, off the coast of Muroto — a marine environment untouched by pollution, rich in trace minerals, and protected by nature’s stillness.
This exceptional water is part of an upwelling current that rises from the deep sea, where sunlight cannot reach — an ecosystem so rare that it represents only 0.1% of the world’s oceans.
(Source: TSUKURU COSME)

2. The Benefits for the Skin

High Purity and Safety

Muroto Deep Ocean Water exists in a pristine environment with minimal human influence, ensuring a level of purity that ordinary water cannot achieve.

A Mineral Composition Close to Life Itself

Surprisingly, the mineral balance of this deep ocean water mirrors that of the amniotic fluid that nurtures life in the womb — an extraordinary similarity that explains its natural compatibility with human skin and its deep, gentle absorption.

A pH That Mirrors Healthy Skin

Once desalinated, this water maintains a pH of 4.5–6.5, identical to the pH of healthy skin.
This balance helps restore the skin’s natural barrier, supporting hydration and improving the penetration of active ingredients.

Activation of Fibroblasts

Studies suggest that the minerals in deep ocean water can help activate fibroblasts — the cells responsible for producing collagen, elastin, and hyaluronic acid.
This process supports firmness, elasticity, and a naturally supple texture.
(Source: TSUKURU COSME)

3. Why We Chose It for Yukari

Our mission at Yukari is to craft authentic, elegant, and high-performing skincare.
That means looking beyond the visible ingredients — to the foundation of every formula: the water itself.

By using Muroto Deep Ocean Water, we can:

  • Enhance the delivery and performance of botanical actives within the skin

  • Provide a light, silky texture that feels effortlessly in tune with your skin

  • Uphold our commitment to purity and mindful formulation, aligned with Japan’s heritage of harmony between nature and science

This water is more than an ingredient — it is a philosophy in itself.
(Source: TSUKURU COSME)

4. What It Means for You

Each time you apply a Yukari product — whether it’s our lotion, serum, or cream — you’re treating your skin to something extraordinary: a base of pure, mineral-rich water that supports every ingredient’s performance.

The result is hydration that feels alive, comfort that lasts, and a skin texture that becomes smoother, brighter, and more balanced over time.
For sensitive or stressed skin, its naturally balanced pH and mineral profile help reinforce the barrier, calm reactivity, and restore equilibrium.

5. The Power Beneath the Surface

The water has power.
Deep ocean water refers to the sea that lies more than 200 meters below the surface.
Off the coast of Muroto, where the land drops dramatically into the deep sea, an upwelling current rises — a breathtaking phenomenon that has shaped the land and life around it.

This rare oceanic movement, found in only 0.1% of the world’s seas, has long supported the people and culture of Muroto.
Its purity and strength have become a symbol of connection, renewal, and hope — not only for the local community but for the countless lives it touches through innovation and care.

Because this water is more than just “delicious water.”
It is a cycle, a connection, a hope — flowing endlessly between people and nature.

Circle. Connect. Become hope.

6. Discover the Secret Within Yukari

Every product in our La Sincia IN/OUT Skincare line, exclusively distributed in Australia by Yukari Wellness & Skincare, carries this extraordinary essence from Muroto’s deep sea.
Experience the harmony of Japanese science and purity — and feel what it means to care for your skin from the inside and out.

 

Sources

  1. TSUKURU COSME – “The Future of Ingredients: Deep Ocean Water of Muroto”
    https://www.tsukurucosme.jp/ingredient/future_01.html

  2. Muroto Deep Sea Water Research Center (高知県室戸海洋深層水研究センター) –
    Research and industrial data on deep ocean water purity and composition.
    https://www.pref.kochi.lg.jp/soshiki/111601/

  3. Japan Deep Ocean Water Association (日本海洋深層水協会) –
    Technical and environmental information on deep sea water applications.
    https://kaiyoushinsousui.or.jp/

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