Rohto Pharmaceutical Co., Ltd. (Headquarters: Osaka City, President: Hidetoshi Seki) announces the launch of 'Gyutto Corset Hair Milk,' a leave-in hair milk from its haircare brand 'Gyutto,' designed for those struggling with frizz, waves, and unmanageable hair due to damage. The product will be available first on e-commerce platforms (Amazon, At Cosme, Rakuten, Rohto Online Store) starting Tuesday, June 23, 2026, followed by nationwide release at drugstores and other retailers from Tuesday, September 15, 2026.

'Gyutto Corset Hair Milk' addresses a common customer concern: hair that becomes wavy or frizzy over time after morning styling—what Rohto defines as 'curl rebound' during the day. As a leave-in haircare solution, it features the proprietary 'Aqua Corset Technology®' to deliver a lightweight, refreshing texture while helping maintain smooth, manageable hair throughout the day.

※1: Due to damage, ※2: Potassium Hyaluronate, Lactic Acid, PVP (all repair ingredients)

A New Approach: Recognizing 'Curl Rebound' as a Real Customer Experience

'Gyutto' is a haircare brand that addresses concerns such as roughness, waviness, and frizz caused by hair damage. Since its 2024 launch, 'Gyutto Corset Hair Mask'—an in-shower treatment easy to incorporate after shampooing—has gained strong customer support, with initial sales reaching approximately four times the original forecast.

Through engagement with customers experiencing waviness, a recurring issue emerged: even after nighttime care or morning styling, hair tends to become wavy, frizzy, or unmanageable during the day. Rohto identified this experience as 'curl rebound' and developed a new haircare solution to address hair concerns that evolve over time.

A Rohto-conducted survey on hair concerns※3 revealed that 82% of women aged 30–60 with high levels of waviness concerns experience 'curl rebound' during the day. Meanwhile, only 43% of those using leave-in treatments for daytime frizz control reported satisfaction, indicating unmet user needs in this category.

Rohto aims to help customers maintain smooth hair all day by combining deep repair through in-shower hair masks with protection against daytime environmental changes that cause 'curl rebound.' Thus, the company developed 'Gyutto Corset Hair Milk,' a texture-controlling hair milk that offers a lightweight, refreshing feel while helping maintain smooth, manageable hair. This product is designed for those concerned about daytime frizz, volume, or those seeking an easy-to-maintain routine for lasting smoothness. As a leave-in treatment suitable for use before blow-drying at night or before heading out in the morning, it supports customers facing hair concerns that change over time.

※3: Rohto Pharmaceutical survey, conducted March 2026. 'Experiencing midday hair waviness (curl rebound)': n=160, women aged 30–60 with high waviness concerns. 'Evaluation of leave-in treatments for daytime frizz control': n=44, women aged 30–60 using leave-in treatments for daytime frizz.

Product Features

① Proprietary 'Aqua Corset Technology®' Targeting Midday 'Curl Rebound'

Focusing on hair prone to waviness and frizz due to UV exposure, humidity changes, and dryness, the product features Rohto’s proprietary 'Aqua Corset Technology®.' Potassium hyaluronate and lactic acid penetrate deep into the hair shaft to repair damaged hair, while PVP coats the hair surface. This dual internal repair and external coating approach realizes 'Texture-Shaping Technology α,' helping to control hair that becomes wavy or frizzy over time.

② Skincare-Inspired Formula for Use Even at the Roots

Developed with ingredients commonly used in skincare, this formula is gentle enough for use near the roots, where waviness often starts. It contains 13 types of beauty ingredients (moisturizing agents)※7 to nourish hair with moisture. Additionally, it includes heat-protectant ingredients※8 to shield hair from heat damage caused by blow-drying, creating a comfortable daily care experience.

※7: Hydrolyzed Keratin (Wool), Sodium Lactate, 11 Amino Acids (Betaine, PCA-Na, Serine, Alanine, Glycine, Glutamic Acid, Lysine HCl, Threonine, Arginine, Proline) (all moisturizing ingredients)

※8: Gluconolactone, γ-Docosalactone (all moisturizing ingredients)

③ Lightweight and Refreshing, Yet Naturally Smooth

Responding to customer feedback seeking frizz control without heaviness, the product adopts a lightweight, milky texture. It absorbs easily into each strand, leaving no greasiness and delivering a refreshing feel. Ideal for those who dislike heavy products, it helps achieve naturally smooth, manageable hair.

④ Subtle Green Tea & Pear Scent

A light, refreshing fragrance that blends well with other haircare or styling products without overpowering them.

Product Overview

Brand Website: https://jp.rohto.com/gyutto/promo/hairmilk/

● 'Gyutto' is a registered trademark of Rohto Pharmaceutical Co., Ltd.

● 'Control Coat Ingredient' is a registered trademark of Rohto Pharmaceutical Co., Ltd.

FACT BOX

  • Source: PR TIMES
  • Category: New Product