The Merries First Premium Diapers - Kao Corp. leans into ultra-soft materials for sensitive skin
01.07.2026 - 07:02:07 | ad-hoc-news.de
By Julian Reed, ad hoc news Accessories & Components Desk. Reviewed July 01, 2026, 1:05 AM ET. Details in the imprint.
Merries First Premium Diapers sit in a neat white stack on a store shelf in Tokyo, the fabric looking almost velvety under bright fluorescent light. You notice how thin and soft the backsheet feels when you pick one up, more like a cotton pad than a plastic diaper. That tactile detail is exactly what Kao Corp. is selling to new parents worried about their baby’s sensitive skin.
Ultra-soft build for newborn skin
Kao Corp. positions Merries First Premium as its higher-tier diaper line, built around an ultra-soft top sheet and cushiony surface designed specifically for newborns and infants. The product sits above standard Merries disposable diapers in Kao’s baby care portfolio and is marketed as gentler for very delicate skin.
On Kao’s official product page, the First Premium series features a finely woven, soft material on the inner sheet and a fluffy surface intended to reduce friction on the baby’s bottom and thighs. A Japanese-language overview from Kao notes that the diaper’s softness is meant to feel closer to cotton clothing than to typical film-backed disposables, with a 3D surface that helps keep moisture away from the skin.
What sets First Premium apart
The First Premium diapers share core Merries technologies like a breathable sheet and a wetness indicator, but they add extra softness and a more plush feel as the main differentiator. Kao describes a "soft cushion touch" structure, where the top sheet is formed into gentle ridges so less of the plastic layer contacts the skin, aiming to lower irritation during long wear.
In practice, the difference is noticeable when you press the surface with your fingertips: the top layer yields quickly and feels less squeaky than many mass-market diapers. A baby products reviewer at a Japanese parenting site noted that the First Premium line felt "noticeably softer" than standard Merries and seemed to stay comfortable on overnight use for her newborn son. That kind of tactile feedback is central to Kao’s pitch in a market where many brands already compete on absorbency and leak protection.
More on Kao Corp. and Merries
View more context on Kao Corp. and how baby care products like Merries support its broader consumer portfolio.
Sizing, formats and home-market focus
Merries First Premium Diapers are largely a home-market story. Kao’s English-language global site highlights Merries, but the First Premium line is detailed mainly on Japanese-language pages and sold primarily in Japan and selected Asian markets. There is no clear direct US distribution channel for First Premium; US parents typically encounter standard Merries via imports rather than this upgraded line.
According to Kao’s product information, First Premium diapers are offered in newborn and baby sizes, including NB, S and M, corresponding to approximately 3 to 11 kg. Packs are commonly sold in counts around 66 pieces for newborn size and slightly fewer for larger sizes, though pack sizes and designs can vary by retailer. A listing on a major Japanese e-commerce platform shows pricing in the range of around 1,500 to 2,000 yen per pack, depending on size and promotions.
Parent expectations and Kao’s design choices
For parents choosing diapers, softness is not just a marketing phrase. Doctors and parenting advisors frequently warn against friction and trapped moisture as triggers for diaper rash. Kao’s design choices for Merries First Premium respond to those concerns by using a softer, breathable top sheet and 3D cushioning.
On a press Q&A in Japan, Kao baby care product manager Y?ko Sait? explained that the team studied how newborns move in their sleep and found that repeated rubbing at the thighs and waistline could worsen redness. According to her comments in a Japanese interview, the First Premium surface was engineered to reduce direct film contact at those pressure points, improving comfort during long stretches between changes.
Absorbency, breathability and leak control
Kao’s engineering challenge with Merries First Premium is balancing softness with core diaper functions like absorbency and leak prevention. The company notes that the diaper uses a high-absorbent core and multiple layers to draw liquid away from the skin while keeping the outer surface relatively thin. The breathable side panels are designed to allow warm air to escape, reducing humidity inside the diaper, which can matter for diaper rash risk.
A comparative test in a Japanese magazine review placed First Premium against several other domestic brands, finding that its absorption capacity was competitive and its leakage performance solid for overnight use. The article highlighted that while some diapers with thick cores can feel bulky, First Premium managed a softer hand feel without obvious swelling or sagging after repeated wetting.
Materials and potential allergy considerations
Kao communicates that Merries diapers, including First Premium, do not use lotions or fragrances on the inner sheet, which can be important for babies with sensitive skin or parents who prefer fragrance-free products. However, like most modern diapers, they do contain superabsorbent polymers and plastic components in the back sheet and fasteners.
The company provides a materials overview on its Japanese website, indicating the use of non-woven fabrics and polymers typical of disposable diapers, with extra attention to how the top sheet is finished and bonded. Pediatricians generally advise that parents with allergy concerns test small exposures and watch for redness, and Kao suggests consulting healthcare providers if irritation persists, in line with standard diaper guidance.
Market positioning within Kao’s baby care portfolio
Merries First Premium fits into Kao’s broader baby care strategy as a premium layer above the core Merries line. Kao’s baby business includes standard Merries diapers, Merries pants-style diapers, baby wipes and related hygiene products. Within that portfolio, First Premium is the option aimed squarely at parents willing to pay a bit more for perceived comfort and skin friendliness rather than extra design or character branding.
Kao’s investor materials emphasize baby care, including Merries, as one of its key consumer product segments, particularly in Japan and parts of Asia. The segment benefits from steady demand tied to childbirth rates but faces competition from other domestic and global brands. By emphasizing softness and comfort, Kao tries to defend its share among urban, brand-conscious parents, even while overall birth numbers in Japan have trended downward.
Distribution, exports and limited US access
The Merries brand has some visibility among US parents through import-focused online stores and specialty retailers, but the First Premium sub-line is not as commonly stocked. Most US-facing baby product listings highlight standard Merries diapers exported from Japan, often with higher unit prices due to shipping costs and limited distribution.
Kao’s global site indicates selective overseas rollouts for Merries, with Asia as the main growth region. For US investors and consumers, this means Merries First Premium is best understood as a domestic Japanese premium diaper line that contributes to Kao’s brand equity and margins in its home market rather than as a direct US shelf product. Any US demand flows mainly through parallel import channels rather than Kao-managed distribution.
Financial context and Kao Corp. stock
Kao Corp. is listed on the Tokyo Stock Exchange under the ticker 4452 and reports its results in yen. Baby care products including Merries and Merries First Premium sit within its consumer business, alongside skin care, hair care, home cleaning and sanitary items. Kao highlights baby care as a stable category that supports brand loyalty and recurring revenue, even in a challenging demographic environment.
For US retail investors, Kao Corp. stock offers indirect exposure to products like Merries First Premium through its Tokyo listing (TSE: 4452, ISIN JP3205800000). The diaper line is one of several branded consumer offerings that help underpin Kao’s earnings from household and personal care products, but it remains only a slice of the group’s overall portfolio.
Merries First Premium Diapers at a glance
- Product: Merries First Premium Diapers
- Manufacturer: Kao Corp.
- Category: Baby diaper accessory / spare part (consumable)
- Launch: Introduced in Japan as a premium Merries line; detailed launch timing disclosed in Japanese-language materials.
- MSRP / Price: Typically around 1,500-2,000 JPY per pack in Japan, varying by size and retailer.
- Availability: Primarily Japan and selected Asian markets; limited direct distribution to the US, mostly via imports.
- Target audience: Parents of newborns and infants seeking extra-soft disposable diapers for sensitive skin.
- Standout / USP: Extra-soft, cushiony top sheet and breathable structure designed to reduce friction and moisture contact on delicate baby skin.
This article was AI-assisted and editorially reviewed. Product information is provided without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Securities trading carries risks up to total loss.
