Salon-Exclusive "Eyelash Serum" Finally Released for General Sale! "ululis Long Eyelash MIZU Serum" Featuring 6% Human Stem Cell Culture Fluid

H2O Co., Ltd. (Headquarters: Minami-Aoyama, Minato-ku, Tokyo; CEO: Osamu Kato), known for its 'ululis' water-based hair care line, will launch 'ululis Long Eyelash MIZU Serum' (hereafter 'MIZU Eyelash Serum')—originally developed as a salon-exclusive product—for general sale at variety stores and drugstores nationwide starting May 1, 2026 (Friday).

This product features a unique formula containing 6% human stem cell culture fluid. Previously limited to select professional salons, the sales channel is being expanded nationwide this spring to allow more people to experience the professional-grade efficacy. Applying the extensive hair care knowledge cultivated by ululis to eyelash care, the brand proposes a new beauty habit for achieving hydrated, firm, and 'naked long' lashes.

Official Website: https://www.ululis.jp/eyelash/

9 out of 10 people want to keep using it: High support from a survey of 100 monitors. Many users face a dilemma: wanting better results but fearing irritation or issues around the eyes. MIZU Eyelash Serum was born to solve this. It balances carefully selected ingredients with a design that prioritizes non-irritation without compromise.

In a survey of 100 eyelash serum users, 95% responded that it was 'easy to use without causing pigmentation,' and 92% said they 'want to use it regularly for its effects.' This highly supported product, featuring a 6% concentration of human stem cell culture fluid, is finally coming to everyone across the country.

[Survey Overview] Method: Internet survey Period: August 18 – September 11, 2025 Target: 100 monitors who used the product Source: PRIZMA Research

Product Features POINT 1: Contains 6% Human Stem Cell Culture Fluid The serum includes 'Human Stem Cell Culture Fluid' and 'Nano-permeable Exosomes,' which are gaining significant attention in the beauty industry. Additionally, 'High-Permeability Support Ingredients' ensure that beauty components reach every corner, supporting the creation of healthy lashes.

POINT 2: MIZU Repair Capsules for Stand-out Lashes The unique 'MIZU Repair Capsules' feature liposomal triple hyaluronic acid, keratin, and peptides. This provides intensive repair for damaged lashes, leading to a hydrated and firm appearance. - Triple Hyaluronic Acid: Combines three molecular sizes for enhanced penetration and moisture. - Keratin: Repairs damage and maintains healthy lash condition. - Peptides: Approaches the lash roots to provide firmness and elasticity.

POINT 3: 10 Types of Beauty Water for the Ideal Lash Foundation Applying ululis' hair care expertise, the serum contains '10 types of beauty water' including Ceramide water, Collagen water, and Niacinamide water. These ingredients provide moisture and prepare the eye area with a '25% moisture content' ideal for lash growth.

POINT 4: 7-Free Formula, Including No Pigmentation-Causing Ingredients Prioritizing eye safety, the formula is free of seven common irritants: pigmentation-causing ingredients, parabens, mineral oils, silicones, petroleum-based surfactants, synthetic colorants, and fragrances. It is also tested for eye and skin irritation, making it easy to incorporate into a daily routine even for those with delicate eyes.