Softymo Deep Cleansing Oil

If you've ever wandered into a Tokyo drugstore and stared at a wall of cleansing oils wondering which one Japanese women actually use, this is most likely what they reached for. The Softymo Deep Cleansing Oil has been quietly dominating Japanese @cosme rankings for years, sitting at around 230 yen per 100ml and outselling cleansing oils that cost four and five times as much. It's also one of the first Japanese drugstore products to develop a cult following in the West, back when J-beauty blogs were arguing over double cleansing and the rest of the world was just figuring out that Western cold cream wasn't actually removing waterproof mascara. The formula is ruthlessly simple. Mineral oil does the heavy lifting — it's the most effective solvent for long-wear sunscreen and silicone-based makeup, full stop. Isohexadecane thins it out and gives it glide. A PEG emulsifier converts the oil into a milky wash the moment it meets water, which is the essential mechanical difference between a Japanese oil cleanser and a pre-cleanse balm. A dash of olive and apricot kernel oils add a light conditioning feel. Tocopherol preserves the oil phase. Fragrance and BHT round out the stability story. That's basically it. There's nothing revolutionary happening at the ingredient level, and Kose isn't pretending otherwise. What this formula does is exactly what you want a first cleanse to do, for about twelve dollars for a very generous 230ml bottle. You pump a few drops onto dry skin, massage for thirty seconds to loosen sunscreen and makeup, splash your fingertips with water to trigger the emulsification, work it into a milk, then rinse. Thirty seconds later your skin is clean, not greasy, and ready for a water-based second cleanse. Stubborn waterproof mascara surrenders on the first try. Japanese-style high-film sunscreens — the kind that refuse to budge under a gentle foaming cleanser — come off cleanly. There's no sting around the eyes, no tightness after rinsing, and no white cast of residue. The shortcomings are honest ones. The fragrance is noticeably sweet in a way that screams Japanese drugstore, and fragrance-sensitive users will want something cleaner. The packaging is a plain plastic pump bottle that doesn't feel remotely premium. The ingredient list is austere — don't expect botanical brightening or hydrating marketing claims, because they're not there. And purists who prefer plant-oil-based cleansers will find the mineral oil base a philosophical dealbreaker, even though the evidence on mineral oil as a safe, non-comedogenic cleansing solvent is overwhelming. None of that changes the core value proposition. For the price of one prestige cleansing balm, you can buy four or five bottles of this, and your makeup will be just as gone at the end of the night. Softymo Deep doesn't need to be sophisticated. It needs to work. And for nearly twenty years, that's exactly what it has done.

Formula

The Science

The effectiveness of this cleanser rests on two well-understood principles in surfactant and emollient chemistry. First, long-chain hydrocarbon oils like mineral oil and isohexadecane are among the most effective solvents for dissolving silicone-based and wax-based cosmetic films, which is why they dominate professional makeup removal formulations. Research on cleansing mechanics — including work published in the International Journal of Cosmetic Science on oil-based cleansing and barrier effects — has consistently shown that properly rinsed oil cleansers cause less transepidermal water loss than many surfactant-based alternatives, because they remove lipophilic soils without disrupting the stratum corneum's intercellular lipids. Second, the PEG-20 glyceryl triisostearate emulsifier is what converts this mineral oil base into a rinsable wash. The emulsifier has a hydrophilic-lipophilic balance tuned to flip from oil-soluble to water-dispersible upon contact with water, carrying away the dissolved makeup and sunscreen particles in the rinse. This is the same emulsification mechanism used in most premium Japanese oil cleansers, including those retailing at four times the price. The non-comedogenicity of cosmetic-grade mineral oil has been established in multiple rabbit-ear and human studies going back decades; pharmaceutical-grade white mineral oil is too large a molecule to penetrate the follicular opening and is classified by most dermatology references as non-comedogenic. The olive and apricot oils are present at levels too low to meaningfully shift that profile.

Dermatologist Perspective

Dermatologists generally endorse double cleansing for patients who wear sunscreen or long-wear makeup, and oil cleansers are commonly recommended as the first step because they remove hydrophobic residues without requiring aggressive scrubbing. Board-certified dermatologists frequently note that mineral oil, despite its bad reputation in wellness marketing, is one of the most skin-safe cleansing solvents available and is non-comedogenic in cosmetic-grade form. Dermatologists commonly flag fragrance content for patients with rosacea or allergic contact dermatitis, which is the main caveat for this specific formula. Patients who prefer fragrance-free options are typically redirected to DHC Deep Cleansing Oil or similar alternatives.

Guidance

Kose launched the Softymo line in the early 2000s as a mass-market alternative to its premium skincare counters, targeting Japanese drugstore shoppers who wanted effective makeup removal at an entry-level price. The Deep Cleansing Oil became the runaway hit of the line and cemented Kose's place in budget J-beauty, spawning multiple spin-off formulas including the Speedy version.

About Kose Legacy Brand (20+ years)

Softymo is Kose's mass-market drugstore sub-brand, sold in Japanese pharmacies for over two decades. The line is not dermatologist-developed but benefits from Kose's legacy formulation expertise and extensive Japanese retail track record.

Brand founded: 1946 · Product launched: 2005

Myth vs. Reality

Myth

Mineral oil clogs pores.

Reality

Cosmetic-grade mineral oil is highly refined, non-comedogenic, and too large to penetrate the follicle. It's actually one of the safest cleansing solvents for acne-prone skin when properly rinsed.

Myth

Expensive oil cleansers work better than cheap ones.

Reality

For makeup removal specifically, the cleansing solvent and emulsifier matter more than fancy botanicals. This $12 formula removes sunscreen and mascara as effectively as cleansers five times its price.

FAQ

Common Praise

"Cuts through stubborn sunscreen"

"Incredibly cheap for the size"

"Emulsifies cleanly"

"Doesn't sting eyes"

"Works on waterproof mascara"

Common Complaints

"Strong added fragrance"

"Mineral-oil base feels heavy to some"

"Plastic pump packaging feels cheap"

Notable Endorsements

Long-running @cosme top-ranked oil cleanserJapanese drugstore bestseller

Appears In

best japanese oil cleanser best budget oil cleanser best cleanser for sunscreen removal best drugstore cleansing oil

Related Conditions

blackheads oiliness

Related Ingredients

mineral oil olive oil apricot kernel oil