ZENOA's Hair Tonic 'Sokon' Refreshes Name and Packaging from a 93-Year-Old Cosmetics Company

Revamped Hair Tonic 'Sokon' Tokyo Biyou Kagaku Kenkyujo Co., Ltd. (Headquarters: Kita-ku, Tokyo; Representative: Takako Ozawa; hereinafter 'Tokyo Biyou Kagaku Kenkyujo'), which develops, manufactures, sells cosmetic products, and operates beauty-related educational programs, announces the renaming of its ZENOA brand hair tonic 'Sokon Sapari Type' to simply 'Sokon,' along with a refreshed package design. The updated product will be available starting Monday, June 22, 2026, on the official online shop, with直营 stores following the rollout gradually. STEP 1 Pre-Shampoo Lotion STEP 2 Soap Shampoo STEP 3 Acidic Rinse STEP 4 Sokon (Hair Tonic) NEW!! ZENOA's Hair Care for Nurturing Hair and Scalp Daily care routines help maintain a healthy scalp and hair. ZENOA's hair tonic 'Sokon' has been sold for years with a focus on minimizing burden to the scalp and hair. While maintaining this philosophy, we have refined the name and appearance, continuing to be a natural, supportive presence in your daily routine. Revamped Release on June 22, 2026 (Mon) STEP 4 | Sokon (Hair Tonic) ZENOA Sokon ¥4,950 (tax included) [Hair Tonic 'Sokon' Focused on Scalp Environment] - Hair Appearance Starts with Scalp Health - "Lately, my hairstyle doesn't hold as I want it to." Underlying such concerns may be scalp dryness or imbalanced conditions. At Tokyo Biyou Kagaku Kenkyujo, we believe that maintaining healthy hair starts with improving scalp conditions. - Scalp Care According to Tokyo Biyou Kagaku Kenkyujo - The scalp, like the face, requires daily care. Because it is prone to dryness and external stressors, maintaining moisture while keeping it in a healthy state is essential. Sokon is a hair tonic developed to support daily scalp care. - What Makes 'Sokon' Special - Sokon contains plant-derived ingredients such as: ・Sohakubi Extract ・Gentiana Extract ・Ginger Root Extract The formula aims to nourish the scalp with moisture and maintain a healthy condition. We also focused on a pleasant texture suitable for daily, continuous use. - Focus on 'Sokon' (Mulberry Root) - The product name 'Sokon' refers to Sohakubi extract derived from mulberry root bark. A traditionally cherished plant ingredient, Sohakubi has been adopted by Tokyo Biyou Kagaku Kenkyujo as a scalp care component. We propose daily scalp care routines that harness the benefits of plant-based ingredients. ______________________ Unchanged Formula, Refined Appearance In this refresh, we kept the texture and formula unchanged, but changed the product name to 'Sokon' to more clearly communicate its features. Sokon contains double the concentration of Sohakubi Extract (a hair conditioning ingredient) compared to our Neo BH Factor ratio. The formula is free of synthetic surfactants, designed to be gentle on the scalp. The packaging has also been updated to a simple, clean design. We continue to deliver consistent quality, making this hair tonic easy to incorporate into daily care routines. ______________________ ZENOA Sokon ZENOA Sokon 150mL / ¥4,950 (tax included) HOW TO USE Before use, shake the container well to mix the contents evenly, then apply an appropriate amount to the scalp. Gently pat with fingertips to help absorption. ※When opening, be cautious of potential spillage—pay attention to container orientation and surroundings. Ingredients Water, Ethanol, BG, Sohakubi Extract, Gentiana Extract, Ginger Root Extract, Akayajio Root Extract, Brown Algae Extract, Hinokitiol, Panthenol, Pyridoxine HCl, Vitamin A Oil, Corn Oil, Ergocalciferol, Tocopherol, Lecithin, Sodium Citrate, Menthol, Resorcin View Details ※This product is scheduled for revamped release starting June 22, 2026 (Mon). Product pages will be updated on the release date. ZENOA Hair Care Overview ZENOA Hair Care Lineup STEP 1 | Pre-Shampoo Lotion ZENOA Pre-Shampoo Lotion ¥2,640 (tax included) Pre-wash scalp cleanser that soothes the scalp and removes excess impurities Using this before shampooing helps dissolve sebum and oil-based dirt with oil, reducing dandruff and itchiness. It makes soap-based shampooing easier and protects the scalp from irritation caused by shampoo agents. Recommended for those concerned about dryness. ______________________ [Benefits of Pre-Shampoo Lotion] Reduces harshness of synthetic shampoos …Overwashing with strong cleansing shampoos may cause dryness Removes sebum and oil-based dirt …Gently dissolves dirt by encapsulating it in oil Reduces dandruff and itchiness …Prevents dryness of the scalp Improves blood circulation through massage …Helps deliver essential nutrients from blood to the scalp Reduces hair tangling …Makes washing easier even with soap-based shampoos ______________________ ZENOA Pre-Shampoo Lotion 150mL / ¥2,640 (tax included) Ingredients Water, BG, Ethanol, Castor Oil, Camellia Seed Oil, Tricaprylyl Citrate, Carrageenan, Xanthan Gum, Camphor, Menthol, Lactic Acid, Tocopherol HOW TO USE Shake the container well before use, then apply an appropriate amount to the scalp (skin). Gently massage with fingertips to absorb. Rinse thoroughly with warm water, then proceed with shampoo. View Details STEP 2 | Soap Shampoo ZENOA Soap Shampoo ¥1,430 (tax included) Light, soft, and refreshing finish Gentle cleansing power to maintain healthy hair and scalp Beautiful hair starts with a healthy scalp. ZENOA Soap Shampoo gently cleanses without stripping excess sebum, leaving hair refreshed and clean. ZENOA Soap Shampoo 280mL ¥1,430 (tax included) / Refill 600mL ¥2,420 (tax included) Ingredients Potassium Soap Base, Glycerin, BG, Allantoin, Sorbitol Fermented Polysaccharide, Ethanol, Sodium Citrate, Citric Acid, Tocopherol, Ethylparaben, Fragrance HOW TO USE Rinse hair with warm water, then apply an appropriate amount to hair and scalp. Lather well with fingertips, wash thoroughly, and rinse well. ☆Wash multiple times as needed depending on dirt level. View Details STEP 3 | Acidic Rinse ZENOA Acidic Rinse ¥1,650 (tax included) Smooth, flexible hair with excellent slip A weakly acidic rinse to restore scalp balance—a step toward beautiful hair An 'acidic' rinse that smooths hair for better slip. Not only hair, but also restores the scalp to a weakly acidic state after soap shampooing, aiming for a healthy scalp.