HYAKKASO Hyaluronic Acid Serum

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Hyakkaso Hyaluronic Acid Serum – 50ml

The Hyakkaso Hyaluronic Acid Serum combines traditional herbal wisdom with modern skincare science. Its unique formulation, centered around hot spring water and natural extracts, offers a holistic approach to skin health. The serum’s rich amber hue is derived from a blend of 10 natural herbal extracts, ensuring that each application delivers nature’s best to your skin.

Key Benefits:

Provides deep hydration without a greasy feel.

Soothes redness and calms irritated skin.

Enhances skin elasticity and reduces the appearance of fine lines.

Assists in fading scars and post-acne pigmentation.

Free from oils, preservatives, colorings, and flavorings.

Key Ingredients:

Hot Spring Water: Sourced from Gifu Prefecture, this mineral-rich water balances and nourishes the skin.

Hyaluronic Acid (Natural Origin): Provides intense hydration, smoothing out skin irregularities and promoting a lifting effect.

Aloe Vera Extract: Regenerates the skin and alleviates redness.

Wormwood, Ginseng, Peony, and Peach Seed Extracts: Address skin rashes, scars, and post-acne pigmentation, promoting a clearer complexion.

How to Use:

1. After cleansing and applying lotion, pour a small amount of serum into your palm.

2. Gently apply first to the driest areas, then evenly over the face and neck.

3. For optimal results, follow with a moisturizer or cream.

・Hyakkaso is committed to natural and organic skincare.

・Free from: Artificial preservatives, coloring, and fragrances.

・Cruelty-free

FAQ:

・Is this serum suitable for sensitive skin?

Yes, its natural formulation is designed to be gentle and is suitable for all skin types, including sensitive skin.

・Can I use this serum under makeup?

Absolutely. The serum is lightweight and oil-free, making it an excellent base for makeup application.

・Does the serum have a fragrance?

The serum is free from artificial fragrances and has a soft peony scent derived from its natural ingredients

We ship internationally from our warehouse here in Tokyo. We use the services of third-party delivery service providers, namely, Japan Post (EMS) and Airmail, for shipping all the orders placed by our customers. View our entire policy here.

Every skin is different, therefore, no returns are accepted simply on the account that the product had an adverse reaction on your skin, or did not provide you any particular kind of results that you were expecting. However, you may initiate a return for the defective and damaged products purchased from the website within a period of7 (seven) days calculated from the order delivery date (“Return Period”). View our entire policy here.

Hot spring water, BG, Yukinoshita extract, Na hyaluronic acid, Kawara mugwort extract, Aloe vera juice, Prunus extract, Licorice extract, Peonies extract, Ginseng root extract, Sakuhakuhi extract, Ogon root extract, Prunus persica extract

What our customers are saying about this product

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Best Quality

All our products come straight from the manufacturer to make sure you're getting the freshest stuff.

Fast Shipping

We only use express delivery to make sure you get your skincare goodies in the shortest time possible.


Unlike generic beauty retailers, Beauty Ninja carefully curates only the most advanced and luxurious Japanese skincare. Every product is tested and approved for its effectiveness.

Have a question?

See some of our common FAQS below

Yes! We source all products directly from Japanese brands, ensuring 100% authenticity.

In Japan, expiration dates are usually not printed on cosmetics unless required (e.g., food or medicated products). However, we keep small stocks and order directly from manufacturers to ensure you get the freshest products. Most items have a shelf life of 2–3 years when stored properly in a cool, dry place away from direct sunlight.

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Orders ship within 1–5 business days (we often order directly from manufacturers to ensure freshness). Once shipped, delivery takes 5–10 days, but times may vary due to customs or other delays.

  • Free for orders over $250 USD
  • Flat rate $15 USD for all other orders.

We ship to over 60 countries, including the USA, UK, Australia, Canada, and most of Europe and Asia. See our shipping page for the full list.

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