Unicharm began manufacturing and selling feminine napkins in 1963, nearly two decades before the Sofy brand was introduced.2

Sofy is not an independent company but a consumer brand within Unicharm Corporation, a Japanese group with businesses spanning baby care, feminine care, adult care, cleaning products and pet care. Unicharm’s involvement in feminine hygiene dates to 1963, when it commenced production of sanitary napkins, later developing tampons and increasingly advanced products before launching Sofy in 1982.2 The corporate structure can be summarised as Unicharm Corporation operating its Feminine Care business through the Sofy brand.

Pre-Sofy era (1963–1981)

Unicharm entered the feminine hygiene market in 1963 with the manufacture and sale of sanitary napkins. Over the subsequent decades, the company addressed common user concerns such as product thickness, nighttime leakage and absorbency. Notable milestones during this period included the introduction of Charm Nap Mini for nighttime protection in 1972, a slimmer version of the same product in 1976 to address complaints about bulk, and the Charm Soft Tampon in 1980. These developments provided the technical foundation upon which the Sofy brand was built.2

Launch of Sofy (1982)

The year 1982 marks the establishment of Sofy as a distinct brand. The name was conceived around the dual concepts of “Sophisticated”, denoting technological refinement and thoughtful design, and “Soft-hearted”, conveying gentleness and consideration for women. From its inception, the brand has been associated with products intended to make menstruation more comfortable and less restrictive.1

Early product innovation

A defining characteristic of Sofy has been its focus on solving practical problems associated with menstruation through product engineering.

• Sofy Sara (1988): Unicharm launched Sofy Sara using a new material designed to improve absorption speed and surface feel, responding to consumer dissatisfaction with the slower absorption of older nonwoven or cotton-type napkins.3
• Sofy Sara Wing (1990): This product introduced wings to help prevent side leakage and enable greater activity during heavier flow.4
• Sofy Sara Super for Night (1991): An overnight product featuring a rear “hip guard” was introduced to reduce backward leakage during sleep.5
• Side gathers (1993): Sofy Sara Side Gathered incorporated three-dimensional side gathers intended to enhance leakage protection.6

These innovations illustrate a recurring strategy of identifying specific menstrual care challenges and engineering products to address them.

International expansion

Following its domestic success, Sofy expanded internationally. Key milestones include entry into Taiwan in 1993,15 Thailand in 1995,2 Singapore, Malaysia and China in 1997,15 Saudi Arabia in 200715 and India in 2010.7 Thailand became a particularly significant market; Unicharm had established a joint venture there in 1987, paving the way for Sofy’s subsequent introduction.15 The brand continues to expand into new territories. For example, Unicharm commenced local production and sales of Sofy products in Kenya in January 2025, with plans for a dedicated East African joint venture.2

Sofy is primarily a menstrual care brand, although specific product line-ups vary by country.

Sanitary pads

Sanitary pads constitute the core category. Sofy develops pads tailored to different flow levels, day or night use, lengths, body shapes, sensitivity requirements, absorbency needs and activity levels. In markets such as Thailand, the portfolio includes ranges like Sofy Cooling Fresh, Sofy Body-Fit, Sofy Protective Edge, Sofy Skin Care, Charcoal Fresh and various overnight products.361112

Overnight products

Nighttime leakage has historically been a major area of innovation. Current offerings in some markets include Sofy overnight pants, designed to provide 360-degree coverage rather than relying solely on a conventional adhesive pad. These products typically feature an elastic fit and breathable construction, representing an evolution of earlier rear and side leakage protection technologies.41014

Tampons

Sofy manufactures tampons, including the SOFY Soft Tampon range available in versions for normal and heavier flow.5 This category has historical roots in Unicharm’s 1980 Charm Soft Tampon, which predated the Sofy brand itself.2 In Japan, the range also includes organic cotton variants.19

Pantyliners

Pantyliners are marketed for everyday use beyond menstruation. Ranges in markets such as Thailand include SOFY Comfort Fresh, SOFY Pure Care Aroma, SOFY Long & Wide and SOFY Cooling Fresh.71113 In Japan, the Kiyora line serves this segment.20

Other women’s care products

Sofy has increasingly positioned itself beyond the traditional sanitary pad category. Unicharm describes the brand as providing products for both menstrual and non-menstrual days.8 In Thailand, for instance, the portfolio includes SOFY Aile, an absorbent product for urinary leakage.9 Japanese offerings also include organic cotton sanitary underwear and sports-specific pads.1718

Comfort

The brand emphasises reducing physical discomfort through thinner construction, softer surfaces, body-fitting shapes and breathable materials.

Protection

Leakage protection remains a central development theme. Historical innovations have progressed from rear protection and side gathers to wings, wider coverage, body-fitting designs and overnight pants.41014

Freedom of movement

Product development has repeatedly emphasised enabling users to move, sleep and participate in daily activities with confidence, rather than treating menstruation as a period of restricted activity.10

Consumer-driven innovation

Unicharm frequently describes Sofy products as direct responses to consumer feedback. Examples include developing thinner products in response to complaints about bulk, faster-absorbing materials to address slow absorption, wings and side gathers for side leakage concerns, and rear guards or 360-degree protection for nighttime leakage. This problem-solving approach is integral to the brand’s identity.346

Despite the apparent simplicity of sanitary pads, Sofy operates in a highly technical category. Key engineering challenges include moving fluid rapidly away from the skin into the absorbent core, managing leakage during movement or position changes, maintaining alignment with the body, reducing bulk without sacrificing absorbency, minimising wetness and friction, and enhancing breathability to reduce heat. Historical development shows a progression from conventional pads toward increasingly specialised structures, materials and body-fitting designs.341112

Sofy is regarded as one of Unicharm’s flagship international feminine care brands. Its global strategy generally combines Japanese product development technology with adaptation to local consumer needs. Consequently, specific products, names, packaging and claims may differ substantially between countries such as Thailand, India, Japan and Kenya.71516

Sofy’s development can be broadly categorised into five stages:

1. 1982–1987 (Establishment): Introduction as a Japanese sanitary care brand.
2. 1988–1994 (Product innovation): Launch of Sofy Sara, wings, rear protection and side gathers, establishing the brand around absorption and leakage prevention.346
3. 1995–2004 (Asian expansion): Entry into Thailand, Singapore, Malaysia and China alongside increasingly specialised products.215
4. 2005–2019 (Broader feminine care): Expansion into thinner products, body-fitting designs, pantyliners and additional technologies. A menstrual period monitoring app was developed in 2018.2
5. 2020s (Women’s wellness): Extension beyond traditional sanitary pads toward broader wellbeing. Corporate history lists initiatives such as Sofy Be, pregnancy-related support, menstrual health products and projects aimed at improving product availability.2

Sofy is increasingly presented as a women’s wellness brand rather than solely a sanitary napkin manufacturer. Recent initiatives include Sofy Be, pregnancy-related support projects, menstrual health programmes, products supporting sleep and recovery, menstrual blood and iron-deficiency checking, and efforts to improve access to sanitary products.2 Geographical expansion continues, with local production commencing in Kenya in 2025 and plans for a dedicated East African business structure.2 The long-term trajectory appears to be a shift from “sanitary pads” to “menstrual care” and ultimately to “women’s health and wellbeing”.

Sofy competes in the feminine hygiene market against brands such as Laurier (Kao), Whisper (Procter & Gamble), Kotex (Kimberly-Clark), Stayfree (Kenvue) and various strong local or regional brands. Its primary differentiation lies not merely in offering sanitary pads—a highly commoditised category—but in product engineering focused on comfort, fit, absorbency, leakage protection and lifestyle compatibility. The brand’s Japanese Unicharm heritage forms an important part of this positioning.16

Key attributes that distinguish Sofy include:

• Japanese origin: Rooted in Unicharm’s extensive history in Japanese feminine hygiene.
• Engineering orientation: A history defined by solving technical problems related to absorbency, leakage, fit and comfort.346
• Lifestyle positioning: Products designed to help users maintain normal activities rather than simply absorb flow.10
• Broad segmentation: Solutions differentiated by flow level, time of day, sensitivity, thickness preference and lifestyle.312
• International scale: Significant expansion beyond Japan, particularly throughout Asia.215
• Beyond menstruation: Increasing inclusion of pantyliners, urinary absorbency products and broader wellness initiatives.89

215

1. Sofy’s History-ผ้าอนามัยโซฟี, แผ่นอนามัย
2. History | Sofy
3. ผลิตภัณฑ์ทั้งหมด-ผ้าอนามัยโซฟี, แผ่นอนามัย
4. ผ้าอนามัย SOFY หลับสนิทตลอดคืน แบบกางเกง-ผ้าอนามัยโซฟี, แผ่นอนามัย
5. SOFY Soft Tampon-ผ้าอนามัยโซฟี, แผ่นอนามัย
6. SOFY ถนอมผิว-ผ้าอนามัยโซฟี, แผ่นอนามัย
7. Learn About Sofy: Leading Brand for Menstrual Hygiene Products
8. SOFY’s History-Sofy Sanitary Pads Napkins
9. ค้นหาผลิตภัณฑ์ปัสสาวะเล็ดที่เหมาะกับคุณ-ผ้าอนามัยโซฟี, แผ่นอนามัย
10. ผ้าอนามัย SOFY หลับสนิทตลอดคืน แบบกางเกง-ผ้าอนามัยโซฟี, แผ่นอนามัย
11. SOFY Cooling Fresh-ผ้าอนามัยโซฟี, แผ่นอนามัย
12. SOFY Cooling Fresh-ผ้าอนามัยโซฟี, แผ่นอนามัย
13. SOFY Comfort Fresh-ผ้าอนามัยโซฟี, แผ่นอนามัย
14. SOFY หลับสนิทตลอดคืน-ผ้าอนามัยโซฟี, แผ่นอนามัย
15. 蘇菲歷史-蘇菲衛生棉
16. HOME-Sofy Sanitary Pads Napkins
17. Sofy SPORTS – sanitary pad-Sofy Sanitary Pads Napkins
18. Product Features｜Sofy Pantyliner Organic Cotton Sanitary Underwear-Sofy Sanitary Pads Napkins
19. Sofy Soft Tampon Organic – Tampons-Sofy Sanitary Pads Napkins
20. SOFY Kiyora Sanitary Pads-Sofy Sanitary Pads Napkins