Made in Japan · Hot Spring Yeast
Japanese Hot Spring Hair & Body Care
Sulfate-free Japanese shampoo, deep conditioner, body wash, and lotion built around hot spring yeast and green algae. Made for dry scalp, frizzy hair, and sensitive skin — without harsh cleansers or heavy residue.
The Onsensou Collection
Twelve Japanese-made formulas covering scalp, hair, and full-body care. Each product is anchored by hot spring yeast and selected botanicals — built for everyday routines.
Hair Treatment Deep Conditioner
Hot spring yeast & green ocean extract · 10.1 fl oz · Sulfate & silicone free
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Dry Scalp Treatment
Green algae, Beppu hot spring yeast, honey & 12 amino acids · 6.76 fl oz
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Kabosu Citrus Repair Shampoo
Hot spring yeast, amino acids & triple ceramide · Anti-frizz · 10.1 fl oz
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Routine Refresh Shampoo
Beppu hot spring algae & yeast · Cooling menthol · Floral · 10.1 fl oz
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Body Wash for Sensitive Skin
Hot spring yeast, ocean nutrients & kaolin · Sandalwood, jasmine, rose · 10.1 fl oz
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Body Wash for Dry Skin
Hot spring yeast, green algae & AHA · Lemon citrus · Daily use · 10.1 fl oz
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Full Body Skin Moisturizer
Hot spring yeast, green algae, shea butter & squalane · Kabosu citrus · 8.45 fl oz
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Daily Care Shampoo + Conditioner Set
Sulfate-free duo for sensitive scalp & dry hair · Hot spring algae & yeast
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Curly Hair Set · Kabosu Citrus
Anti-frizz duo for curly hair · 12 amino acids & triple ceramide complex
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Routine Care Set · Clarifying
Sulfate-free clarifying set · Hot spring yeast for oily or itchy scalp
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Body Wash · Sensitive · 2-Pack
Two-bottle value · Hot spring yeast, green algae & kaolin · 2 × 10.1 fl oz
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Body Wash · Dry Skin · 2-Pack
Two-bottle value · Hot spring yeast, green algae & AHA · 2 × 10.1 fl oz
Check AvailabilityWhy Onsensou — A Japanese Shampoo Made for Dry Scalp
Onsensou is a natural shampoo for dry scalp, plus a full hair and body line built around three principles drawn from Japanese hot spring care.
Hot Spring Yeast from Beppu
Our signature ingredient is mineral-rich hot spring yeast, sourced in Japan. It supports moisture retention on the scalp and skin, helping reduce the tight, dry feeling that often follows washing — a calmer base for both hair and body care.
Green Algae & Ocean Nutrients
Green sea-plant extract and marine-derived nutrients run through the line — smoothing rough strands, calming frizz, and giving skin a more refined, balanced texture without weighing anything down.
Clean, Sulfate-Free Formulas
No sulfates, no silicones, no parabens, no artificial colorants. Onsensou is built for daily routines that leave hair soft and the scalp clean — without the heavy, coated finish of conventional shampoos.
Find Your Onsensou Formula
Match a concern to the right product. Each pick links straight to its Amazon listing.
Dry, sensitive scalp
Hair Treatment Deep Conditioner
Frizzy or curly hair
Dry Scalp Treatment with Green Algae & Honey
Damaged or color-treated hair
Kabosu Citrus Repair Shampoo
Daily refresh, oily or itchy scalp
Routine Refresh Shampoo (menthol)
Sensitive skin, full-body cleanse
Body Wash for Sensitive Skin
Dry skin, rough arms or legs
Full Body Skin Moisturizer
About Onsensou
Japanese hot spring tradition, translated into a daily routine you can actually keep.
In Japan, the onsen has always been more than a bath. Mineral-rich hot spring water, quiet ritual, and the slow rhythm of cleansing are connected with comfort and renewal. Onsensou — pronounced on-sen-sou — carries that idea into a modern hair and body care line, made in Japan for everyday use.
At the center of the line is hot spring yeast, including ingredients sourced from Beppu, one of Japan's most well-known hot spring regions. Combined with green algae extract, ocean nutrients, ceramides, amino acids, honey, kaolin, and shea butter, the collection is shaped around dry scalp, damaged hair, frizz, rough skin, and daily sensitivity.
We make sulfate-free shampoos, deep conditioners, dry scalp treatments, body washes, and a full-body lotion — formulated to feel clean and refined rather than heavy or stripped.
Built around the scalp, not just the hair
Most hair products focus on the hair shaft. Onsensou starts higher up. A scalp that feels tight, itchy, or irritated quietly drives a lot of what we don't like about our hair: dullness, frizz, hair that tangles too easily. Hot spring yeast is selected to support a calmer, more balanced scalp environment, while green algae and amino acids smooth and soften the lengths.
Refined, not aggressive
Onsensou is designed for adults — women and men — who want gentle Japanese-made beauty care without harsh cleansers, heavy silicones, or strong chemical residue. The textures are light, the scents are subtle and natural, and the finish is the kind of clean that feels like the end of a long, quiet bath.
Onsensou Reviews
“First time using a conditioner from this line. Moisturizing, clean, and refreshing — but never heavy.”
Olivia
“I picked this up after my hairstylist recommended trying sulfate-free products for my color-treated hair. The texture is different from regular shampoos. The scent is subtle and spa-like (which my partner appreciates since we share it), though people who love strongly fragranced products might find it too mild.”
Alex
“I didn't know what to think when I ordered this — I'm allergic to scented products, I wasn't familiar with the brand, and I have very fine, dry hair. After a few days I'm obsessed with how my hair feels. The scent is natural and doesn't irritate my skin at all, it foams up and cleanses like no other, and it actually hydrates my hair. I barely need conditioner. Hair looks shinier and healthier after only two days. A little goes a long way. I'll definitely buy again.”
Rk Star
“I've been using this as a clarifying shampoo, only 1–2 times a week. The smell is very refreshing and pleasant. I get a good balance of cleansing without stripping my hair — it removes buildup and leaves the scalp refreshed, with shiny, smooth-ish results. I have curly hair so I couldn't use it every day, but it's perfect once or twice a week and helps stretch my expensive curly products.”
S Spencer
“This is my absolute favorite wash in the house at the moment. I keep it next to the sink because I love it so much. The scent is soft, subtle, and exquisite — a true luxury.”
a human being
“Good scent and not sticky. The price is reasonable and I buy them in bulk to use with my family.”
けんじ
The Onsensou Ritual
Four quiet steps. Hair, scalp, and body — handled in the same shower, the same way every day.
01
Cleanse the scalp
Massage in an Onsensou sulfate-free shampoo and rinse fully. The dense foam reduces friction so hair feels clean without that stripped-tight feeling.
02
Condition the lengths
Apply a deep conditioner or dry-scalp treatment from mid-lengths to ends. Hot spring yeast and amino acids soften the hair and support a healthier-feeling scalp.
03
Cleanse the body
Use the moisturizing body wash with hot spring yeast, green algae, and kaolin or AHA — gentle enough for daily use on dry or sensitive skin.
04
Lock in moisture
Finish with the full-body skin moisturizer. Shea butter and squalane keep skin smooth and comfortable, especially on arms, legs, and elbows.
Frequently Asked Questions
Everything you need to know about Onsensou — ingredients, who it's for, and how to build a routine.
Build Your Onsensou Routine
Sulfate-free Japanese shampoo, deep conditioner, body wash, and lotion — designed for dry scalp, frizzy hair, and sensitive skin.
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