Carena, a hair care brand run by Arute Co., Ltd., will release refill sizes of "Carena Silky Shampoo" and "Carena Silky Treatment" at 12:00 on August 1, 2026.
These eco-conscious large-capacity types, 500 mL and 500 g, feature an ingredient design with Japan's first*¹ formulation. They will be sold at the official Carena online store.
A Large Refill Size Arrives for Carena's Hair Care
Carena has announced that even before general sale, it received many requests such as "please sell a refill size too" and "we want a large-capacity type that is easy to keep using."
In response to these voices, a 500 mL shampoo (¥7,150, tax included) and a 500 g treatment (¥6,820, tax included) will join the lineup as refill sizes.
Like the bottle types, they keep the ingredient design with Japan's first*¹ formulation and the same feel in use, making daily hair care easier to keep up.
An Original Formulation With Silk-Derived Ingredients and Carefully Selected Repair Ingredients
"Carena Silky Shampoo & Treatment" features an ingredient design that aims for silky, smooth, glossy hair, with an original blend, a first in Japan*¹, of three cross-linking ingredients*² and active keratin*³.
Focusing on protein, which makes up about 80% of hair, the shampoo contains the silk-derived cleansing ingredient "silk PPT surfactant*⁴" at a high concentration*⁵.
This is said to create a rich, dense lather, repair the hair while washing and lead to light hair that runs smoothly through the fingers.
The treatment is designed without quaternary cationic surfactants, which have been much discussed in recent years, with irritation in mind. Carena explains that it focused on how such ingredients, which can leave a heavy finish or stick to the scalp depending on hair type and usage, also affect how the finish feels.
It contains the following carefully selected repair ingredients.
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Active keratin*³: A repair ingredient that focuses on the SS bonds of the hair.
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Tostea®*⁶: Penetrates inside the hair, suppresses waviness caused by humidity and damage, and improves finger-combability.
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Elaplex-i®*⁷: Penetrates inside the hair, repairs damage and increases strength.
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Hydroxypropyl Gluconamide*⁸: Supports the bonding of keratin inside the hair and is expected to provide a reinforcing effect and improved finger-combability.
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Pellicia®︎*⁹ (in the treatment only): Penetrates inside the hair in a short time to promote damage repair and moisturizing.
Carena's Hair Care, Aiming for Light, Smooth Finger-Combability
Carena's products are designed not to add a moist heaviness, but to aim for a light, smooth feel through the fingers and a sleek, high-quality finish.
The company explains that the formulation suits those concerned about hair damage, tangles, dryness and split ends, as well as those who also want to care for their scalp environment.
Future Plans and the Brand Producer
Carena plans to start a subscription service at its official online store, and is also expanding availability at beauty salons and hair salons.
Through this, it says it aims to create an environment where more users can pick up Carena's products.
Around the Obon holiday, it also plans to release a "7-day trial" that is easy to try for first-time users.
Going forward, while valuing user feedback, the company plans to develop new products starting with hair oil and expand its hair care line, offering the experience of "shining more as yourself through your hair."
The Carena brand is produced by Hiroki Fujita, CEO of Arute Co., Ltd. As a beauty expert, he draws on the knowledge he built during his time as a beauty dealer to explain hair care products logically. He has great influence, with more than 150,000 followers in total on X (as of May 2026).
Here are Hiroki Fujita's social media accounts.
Carena Official Online Store
Carena official Instagram: https://www.instagram.com/carena.jp/
*¹ Formulation design that simultaneously blends the ingredient groups below, within the scope of the survey (shampoos and treatments sold in Japan): for shampoo, the ingredient group below, and for treatment, the ingredient group below. The treatment is also free of quaternary cationic surfactants. (As of January 24, 2026 / Survey by Future Trend Research Organization Co., Ltd.)
Shampoo: Sodium Lauroyl Hydrolyzed Silk, Sodium Lauroyl Silk Amino Acids, Hydrolyzed Keratin (wool), Hydroxypropyl Gluconamide, Hydroxypropylammonium Gluconate, Diammonium Aminoethylthiosuccinate, Isophoronediamine Sesquimaleate
Treatment: Stearamidopropyl Dimethylamine, PPG-1/PEG-1 Stearamine, Hydrolyzed Keratin (wool), Hydroxypropyl Gluconamide, Hydroxypropylammonium Gluconate, Diammonium Aminoethylthiosuccinate, Isophoronediamine Sesquimaleate
*² Hydroxygluconamide, Hydroxypropylammonium Gluconate, Diammonium Aminoethylthiosuccinate, Isophoronediamine Sesquimaleate (all hair repair)
*³ Hydrolyzed Keratin (wool) (hair repair)
*⁴ Sodium Lauroyl Hydrolyzed Silk, Sodium Lauroyl Silk Amino Acids (all cleansing)
*⁵ Based on our formulation design, the silk-derived PPT surfactant⁴ is blended as the main cleansing ingredient
*⁶ Diammonium Aminoethylthiosuccinate (hair repair)
*⁷ Isophoronediamine Sesquimaleate (hair repair)
*⁸ Hair repair
*⁹ Lysine Na Dilauroyl Glutamate (hair repair)
◯Tostea® is a registered trademark of Oriental Chemical Co., Ltd.
○Elaplex® is a registered trademark of SAMIN CHEMICAL Co.Ltd.
◯Pellicia®︎ is a registered trademark of Asahi Kasei Finechem Co., Ltd.
