A new intensive lip care product featuring rare green cocoon silk launches on the mystical day of the new moon. Kimono Brain Co., Ltd., based in Tokamachi City, Niigata Prefecture, announces the release of "Midorimayu Moist Lip Essence" from its skincare brand Itoguchi on January 19, 2026 (Monday).
Itoguchi has earned customer appreciation for its products featuring rare green cocoon silk components as key ingredients, gently supporting sensitive or aging skin like a protective charm. Following numerous customer requests for lip care, this luxurious all-in-one lip essence provides protection, healing, and intensive moisture for plump, glossy lips that resist dryness, aging, and daily stress.
A Romantic Message from the New Moon
The chosen launch date coincides with the new moon on January 19, 2026 (Monday) at approximately 4:52 AM.
In astrology, the new moon represents "reset" and "new beginnings," a mystical day filled with special energy. This deeply resonates with the product's message of liberation from old skin concerns and dryness, allowing transformation into beautiful lips and a fresh restart.
The moon's phases are intimately connected with women's biorhythms. On this special day, gently push the "switch" in your heart to believe in your beauty's potential and take a new step forward. This lip essence becomes more than just a cosmetic—it's a romantic charm symbolizing a "vow to beautiful self."
Product Features
Luxurious High-Adhesion Lip Essence with Green Cocoon Silk
All-Night Protection Against Dryness
1. High-Moisture Green Cocoon Silk Components*¹ Deliver Deep Hydration
Itoguchi's proprietary green cocoon silk components*¹, cultivated and extracted in-house, contain abundant skin-essential elements with both low and high molecular weight sericin.
These green cocoon silk components¹ form the core of a "Water-in-Oil" formulation with highly concentrated water-soluble ingredients. The formula also includes luxurious additions of Ceramides³ (Ceramide NP, AP, EOP), Bakuchiol⁴, oil-soluble Vitamin C⁵ (Tetrahexyldecyl Ascorbate), and plant-derived emollient components*⁶ (Sunflower Seed Oil, Camellia Seed Oil). This intensive moisture delivery adheres perfectly to lips, maintaining long-lasting hydration.
2. Highest Fibroin*² Concentration in Silk-Infused Skincare Series
Among products in the Silk-Infused Skincare series, this lip essence contains the highest concentration of Fibroin², a component of green cocoon silk¹ with a structure similar to skin's Natural Moisturizing Factor (NMF). Beyond moisture delivery, the silk film seals and protects hydration. This all-in-one lip essence combines "protection + healing + intensive moisture," making it suitable even for sensitive skin.
Recommended Usage
As a Nighttime Lip Mask Before Sleep
Green cocoon silk components*¹ envelop lips all night, thoroughly blocking dryness.
As a Lip Base Before Makeup
Sustained moisture retention prevents extreme dryness, eliminating the need for daytime reapplication.
Apply to entire lips and gently blend by pressing lips together. Due to high silk content, the product initially appears white but becomes transparent within minutes (approximately 3-5 minutes).
*¹Hydrolyzed Sericin, Fibroin (moisturizing), *²Hydrolyzed Fibroin (moisturizing), *³moisturizing, *⁴moisturizing, *⁵conditioning, *⁶moisturizing
Product Overview
Brand: Itoguchi
Product Name: Midorimayu Moist Lip Essence
Launch Date: January 19, 2026 (Monday)
Volume/Price: 10g / ¥1,980 (tax included)
Official Online Store: https://shop.silklifelab.com/
Retailers: Silklifelab Official Online Store, Amazon Silk Life Laboratory Online Store, LOFT stores (Sendai/Ikebukuro/Omiya/Kawasaki/Kichijoji/Chiba/Ginza/Futako-Tamagawa/Shibuya/Yokohama/Umeda/Kyoto/Kobe/Tenjin)
New Product Launch Campaign
Commemorating the Midorimayu Moist Lip Essence launch, special sets combining the product with popular brand items will be available. Visit the official Online Store for this limited opportunity.
Campaign Period: January 19, 2026 (Monday) – February 1, 2026 (Sunday)
Details Page: https://shop.silklifelab.com/collections/lip-essence-cp
About Itoguchi
Itoguchi cultivates "green cocoons" in-house in Tokamachi, Niigata, performing proprietary extraction to deliver skincare, body care, and hair care products rich with these benefits. Using precious green cocoon beauty components as a base, the brand has proposed new pathways to ideal skin—a different approach from conventional skincare—addressing modern concerns of dryness, aging, and skin fluctuations.
About Kimono Brain
Kimono Brain Co., Ltd., developer and manufacturer of Itoguchi, operates kimono aftercare solution services and sterile artificial-feed year-round sericulture operations. The company cultivates "green cocoons" in-house in Tokamachi, delivering products rich with their benefits.
Company Overview
Company Name: Kimono Brain Co., Ltd.
Headquarters: 6-510-1 Takada-cho, Tokamachi City, Niigata Prefecture 948-0056
Representative: President and CEO: Matsuo Okamoto
Established: May 1988
Capital: 90 million yen
Website: https://www.kimono-brain.com/
Business Activities: Kimono aftercare solution services, Sterile artificial-feed year-round sericulture operations, and others
