Osaji Tuning Hydrating Lotion, 150ml

(1) Lactate Complex mirrors NMF composition to support the skin's natural barrier from within
(2) High-concentration NMF ingredients — PCA-Na, urea — leave skin plump without stickiness
(3) Sensitive-skin tested formula suitable for reactive, fluctuating, or barrier-compromised skin

Most toners sit on the surface of the skin and feel hydrating for the first few minutes. The OSAJI Tuning Hydrating Lotion is doing something more considered. Its Lactate Complex — a blend of magnesium, calcium, and potassium lactate — mirrors the mineral-acid composition naturally found in a healthy stratum corneum, so rather than simply adding moisture from the outside, it supports the skin's own ability to hold onto what's already there. This is the approach OSAJI calls their Corneo Repair Method, and it makes the formula particularly well-suited to skin that feels tight after washing, fluctuates with seasons or stress, or simply never quite feels settled. The texture starts crisp and watery on the palm, then settles into something more mellow and cushioning as it sinks in — no streaky dryness, no tacky finish. Skin looks calm and even toned rather than glassy or dewy. The Tuning line adds an aromatic woody fragrance that opens with geranium and lavender, moves into the warmth of myrrh and Japanese hinoki cypress, and finishes with a bright note of yuzu. It's designed to make the act of applying skincare feel like a small, deliberate pause — and it does.

(1) Lactate Complex (Potassium, Calcium & Magnesium Lactate): helps restore and maintain the stratum corneum's natural moisture balance
(2) PCA-Na (Sodium PCA): a primary NMF component that draws and retains water within the skin layer
(3) Urea: another NMF-identical ingredient that softens rough texture and improves moisture retention
(4) Dihydroxypropyl Arginine HCl (Amino Acid Derivative): a conditioning agent that helps the formula absorb smoothly and maintain a soft surface finish
(5) Geranium Oil / Lavender Oil / Hinoki Cypress Oil / Yuzu Peel Oil: the aromatic woody scent blend — botanical essential oils used at skin-friendly levels

Water, glycerin, propanediol, pentylene glycol, potassium lactate, calcium lactate, magnesium lactate, sodium lactate, lactic acid, urea, sodium PCA, dihydroxypropyl arginine HCl, diglycerin, polyglyceryl-10 myristate, polyglyceryl-10 oleate, hexyl dimethylolpropionate, cananga odorata flower oil, pelargonium graveolens oil, cypress oil, myrrh oil, lavender oil, marjoram leaf oil, camphor tree bark oil, yuzu peel oil

After cleansing, take approximately a 500-yen coin sized amount into the palm of the hand. Rather than swiping across the face with a cotton pad, press the lotion firmly into the skin using both palms — start at the centre of the face and work outward, pressing and holding briefly to encourage absorption. For areas that feel noticeably dry or tight, go back with a second layer before moving on to the next step. Follow with the Tuning Emollient Cream or a moisturiser of choice to seal moisture in. Can be used morning and evening.

Q: What is the difference between the OSAJI Tuning Hydrating Lotion and the OSAJI Neutral Hydrating Lotion?
A: The formula is the same — both contain the Lactate Complex, NMF components, and amino acid derivatives in identical concentrations. The only difference is fragrance: the Tuning version carries the aromatic woody scent of geranium, lavender, myrrh, hinoki, and yuzu. The Neutral version is completely fragrance-free. If scent sensitivity is a concern, the Neutral line is the safer choice.
Q: What does the OSAJI Tuning Hydrating Lotion scent smell like?
A: It's an aromatic woody fragrance — soft and grounding rather than floral or citrus-forward. Geranium and lavender open the scent with a gentle herbal quality. Myrrh and hinoki cypress bring warmth and depth in the middle. A bright note of yuzu lifts the finish slightly. Several reviewers note it's stronger than expected on first contact but settles quickly to something quieter and more subtle on the skin.
Q: Is the OSAJI Tuning Hydrating Lotion suitable for oily or combination skin?
A: Yes — the formula is designed to be high-moisture without any heaviness or residue. The water-first base and NMF-focused ingredients mean it absorbs cleanly and doesn't sit on the skin's surface. OSAJI specifically lists fluctuating oily or combination skin prone to shininess as one of the target conditions for this lotion.
Q: How much should I use per application of the OSAJI Tuning Hydrating Lotion?
A: OSAJI recommends a 500-yen coin sized amount (roughly a generous palmful) per application, pressed into the skin rather than patted or swept. For noticeably dry areas, layering a second application is recommended.
Q: Can the OSAJI Tuning Hydrating Lotion be used as a sheet mask soaker?
A: Yes — the watery, low-viscosity texture makes it well-suited for use with a cotton pad mask or hydrating sheet. OSAJI also offers their own Tuning Moisture Sheet Mask as part of the same line for a more intensive version of this step.