“Japanese hair mousse” can mean two very different things: a treatment foam that cares for damaged hair, or a styling foam that holds waves and curls. The Amatora OQ Leave-In Treatment Mousse is the first kind, and it is one of our best sellers at Kija Hair Salon in Irvine. Here is what it does, what’s in it, how to use it, and when a Japanese styling foam is the better pick.
The short answer: for dry, dull or damaged hair that needs moisture and shine, choose the OQ Leave-In Treatment Mousse. For hold on waves and curls, choose an Arimino Spice Foam. You can also use the OQ under a styling foam.
Best Japanese Hair Mousse: Treatment vs. Styling Foam
| Mousse | Type | Best for | Hold | Price |
|---|---|---|---|---|
| Amatora OQ Leave-In Treatment Mousse | Leave-in treatment foam | Damaged, dull or dry hair; gloss and easier styling | None: it’s a treatment | $52 |
| Arimino Spice Foam Hard | Styling mousse | Bringing bounce back to tired waves and curls | Hard, re-workable | $24 |
| Arimino Spice Foam Super | Styling mousse | Thicker waves and curls; curl definition | Strong | $22 |
Prices checked October 2026. All three are made in Japan and ship from our salon in Irvine. The Spice foams are aerosols and are final sale.
Amatora OQ at a Glance
| OQ Leave-In Treatment Mousse | |
|---|---|
| Made for | Damaged and dull hair |
| What it does | Helps hair lock in moisture, adds instant gloss, and gives a silky-smooth texture that is easier to style |
| Format | Foam, left in (no rinsing) |
| Use on | Towel-dried hair, before blow-drying |
| Size | 6.7 oz (200 ml) |
| Price | Amatora OQ Leave-In Treatment Mousse: $52 |
What It Does
Amatora is a professional Japanese hair care brand. The OQ mousse is a foam treatment designed for damaged, dull hair, and our product description sums up what it is built to do:
- Intense hydration: helps hair lock in moisture so it stays hydrated and resilient.
- Instant gloss: apply, dry, and hair takes on a glossy shine.
- Triple-layer care: the formula acts on three levels to repair hair damage, from surface to core.
- Herbal infusion: a blend of herbs works to neutralize oxidative damage and revive the hair’s natural luster.
- Effortless styling: a silky-smooth texture that makes blow-drying easier.
What’s Inside
Key ingredients on the label include ceramides (1, 2, 3 and 6 II), hydrolyzed keratin, sodium hyaluronate (hyaluronic acid), hydroxypropyl chitosan, humus extract, cholesterol and platinum powder. Dimethicone is the second ingredient, so the formula contains silicone, which helps give the smooth, glossy finish. The full list is on the product page.
How to Use It
- Wash your hair as usual.
- Towel-dry until it is damp, not dripping.
- Apply the foam evenly through your hair, concentrating on the mid-lengths and damaged ends.
- Leave it in and blow-dry or style as usual.
Using a styling foam too? Apply the OQ first, then a small amount of Spice Foam for hold, and diffuse or air-dry.
Build the Amatora Routine
| Step | Product | Why | Price |
|---|---|---|---|
| 1. Wash | Amatora QUO Hair Bath | A keratin-rich cleanser made for color-treated hair that prepares the hair to absorb treatment | $58 |
| 2. Treat and style | Amatora OQ Leave-In Treatment Mousse | Leave-in foam for moisture and gloss before blow-drying | $52 |
Together they come to $110, so the order ships free. See which Amatora QUO to buy to add a weekly mask.
Why Buy It From Kija Hair Salon
Many online listings of Japanese salon hair care ship from Japan, which can mean a long wait. We stock the OQ mousse at our salon in Irvine, California, and ship it within 1 to 2 business days. U.S. orders over $40 ship free.
Frequently Asked Questions
What is the best Japanese hair mousse?
It depends on what you need. For damaged or dull hair, the Amatora OQ Leave-In Treatment Mousse. For hold on waves and curls, Arimino Spice Foam Hard (hard, re-workable hold) or Spice Foam Super (strong hold and curl definition for thicker hair).
Is the OQ mousse a styling mousse?
No. It is a leave-in treatment foam. It makes hair smoother and easier to style, but for hold, add a styling foam such as Arimino Spice Foam Hard.
Do I rinse it out?
No. Apply it to towel-dried hair, leave it in and blow-dry or style as usual.
Does it contain silicone?
Yes. Dimethicone is the second ingredient on the label.
Is it good for color-treated hair?
It is made for damaged and dull hair, which includes hair that has been colored or heat-styled often. Pair it with the QUO Hair Bath, which is made for color-treated hair.
Shop the OQ Leave-In Treatment Mousse, $52 · All Amatora · Best Japanese hair treatments