If your hair has started to feel dry, dull, or rough at the ends, a leave-in treatment can do more for it than almost any other step in your routine. The Amatora OQ Leave-In Treatment Mousse is one of the most effective we carry at Kija Hair Salon — a Japanese salon foam that repairs damage from within while leaving a clean, glossy finish on the surface. Here is what makes it different, who it is for, and exactly how to use it.
What Is the Amatora OQ Leave-In Treatment Mousse?
Amatora is a professional Japanese haircare brand known for science-led formulas that salons rely on during in-chair treatments. The OQ Leave-In Treatment Mousse takes that same professional repair technology and puts it into a lightweight, take-home foam. You apply it to damp hair after washing and it works as you blow-dry — no rinsing, no heavy residue, no weighing your hair down.
It is built specifically for damaged, dull, and dry hair: the kind of hair that has been through color, heat styling, or simply time.
Why a Foam Treatment Works Better Than a Regular Leave-In
A foam disperses far more evenly than a cream or an oil. Instead of coating only the surface, the mousse spreads through every strand and carries its active ingredients deep into the hair, where damage actually lives. The result is repair that feels like it comes from within — not a temporary slick on top that rinses away. Amatora's formula is designed to work on three levels at once, treating the surface, the mid-layer, and the core of each strand.
The Key Benefits
- Instant gloss. Apply, dry, and your hair takes on a luminous, healthy shine right away.
- Deep, lasting hydration. The formula helps hair hold on to moisture so it stays soft and resilient rather than brittle.
- Triple-layer repair. It addresses damage comprehensively, from the cuticle surface down to the core.
- Weightless finish. No greasy build-up, even with daily use — your hair keeps its natural movement.
- Smoother styling. Hair becomes easier to blow-dry and style, with less frizz and fewer flyaways.
What's Inside: Ceramides, Keratin, and More
The mousse earns its results from a genuinely sophisticated ingredient list:
- Ceramides (1, 2, 3, and 6 II) — the lipids that hold the hair cuticle together and seal in moisture, helping rebuild a damaged outer layer.
- Hydrolyzed keratin — replenishes the protein hair is actually made of, strengthening weak, over-processed strands.
- Sodium hyaluronate (hyaluronic acid) — a powerful humectant that draws in and holds hydration.
- Hydroxypropyl chitosan and cholesterol — reinforce each strand and smooth the surface for a glassy finish.
- Botanical and humus extracts — help neutralize oxidative damage and revive the hair's natural vitality and luster.
It is the combination of surface-smoothing conditioners, structural proteins, and moisture-binding agents that gives the mousse both its immediate shine and its longer-term repair.
How to Use Amatora OQ Leave-In Treatment Mousse
- Prep. Wash your hair, then towel-dry until it is damp rather than dripping.
- Apply. Dispense the foam into your palm and distribute it evenly through your hair, concentrating on the mid-lengths and damaged ends.
- Style. Leave it in — do not rinse — then blow-dry or style as usual. The treatment sets as your hair dries.
For best results, use it every time you wash. Because it is weightless, daily use will not cause build-up.
Who Should Use It
The OQ Mousse is ideal if you have color-treated, heat-damaged, dry, or dull hair and want a single product that repairs and adds shine without a complicated routine. It suits virtually all hair types, and because it doubles as a light styling primer, it fits just as easily into a quick morning routine as a full wash day.
Build the Full Amatora Routine
For hair that has been significantly compromised, pair the mousse with the Amatora QUO Hair Bath anti-aging shampoo — a keratin-rich cleanser that prepares the hair to absorb treatment. You can read more about it in our complete guide to the Amatora QUO Hair Bath. Cleansing and treating with the same professional system gives you noticeably better, longer-lasting results than mixing unrelated products.
Why Buy It from Kija Hair Salon
Authentic professional Japanese haircare is hard to find in the United States. Most listings online ship directly from Japan, which means one to two weeks of waiting and the risk of customs and import fees. At Kija Hair Salon, the Amatora OQ Leave-In Treatment Mousse is stocked and ships from California — quickly, with no overseas wait and no surprise fees at your door.
Every product we retail is one our professional stylists actually use and trust, curated so your hair stays healthy and vibrant between visits. Orders over $55 ship free.