The Skin Journal

How Long Does a Persimmon Soap Bar Last?
How Long Does a Persimmon Soap Bar Last?
Sticker price is the wrong number for a daily-use soap. Here is the arithmetic that actually decides whether a persimmon bar is expensive. How long a bar lasts With one... Read more...
5 Persimmon Soap Myths That Waste Your Money
5 Persimmon Soap Myths That Waste Your Money
Persimmon soap earned its reputation in Japan — and then the internet got hold of it. Five myths worth clearing up before you spend money. Myth 1: any orange soap... Read more...
A Kind Way to Help a Parent With the Aging Smell
A Kind Way to Help a Parent With the Aging Smell
There is no graceful way to tell a parent they smell. There is, however, a kind one — and it works better than the honest conversation most families never manage... Read more...
Nonenal vs Regular Body Odor: Which One Do You Have?
Nonenal vs Regular Body Odor: Which One Do You Have?
Not every odor after forty is nonenal — and the wrong diagnosis wastes months on products that cannot work. Here is how to tell the two apart in one evening.... Read more...
Why Your Pillow Smells (Even After Washing)
Why Your Pillow Smells (Even After Washing)
You wash the pillowcase, and three days later the smell is back. The pillow is not the problem — it is the messenger. What the pillow is telling you Eight... Read more...
Can You Use Persimmon Soap on Your Scalp and Hair?
Can You Use Persimmon Soap on Your Scalp and Hair?
The scalp produces more sebum than anywhere else on the body — which makes it prime nonenal territory, and explains why caps, helmets and pillows smell before skin does. So:... Read more...
Nonenal in Women: Menopause and the Smell Nobody Discusses
Nonenal in Women: Menopause and the Smell Nobody Discusses
Nonenal is usually marketed at men, but the research that identified it studied both sexes — and for women, the timing has a hormonal twist nobody warns you about. Estrogen... Read more...
Old Man Smell: Why Men Get Nonenal Earlier and What Works
Old Man Smell: Why Men Get Nonenal Earlier and What Works
“Old man smell” has a name — 2-nonenal — and a reason it tends to hit men earlier and harder than women. Why men get it earlier Men produce more... Read more...
The Japanese Evening Bathing Ritual for Mature Skin
The Japanese Evening Bathing Ritual for Mature Skin
Japan thinks about bathing differently: not as removal, but as maintenance. That mindset is exactly why the solution to the aging smell came from there. Here is the mature-skin version... Read more...
Why You Still Smell After Showering (and What Finally Works)
Why You Still Smell After Showering (and What Finally Works)
You shower, you scrub, and an hour later the smell is back — or it never left the pillowcase. Before assuming hygiene, run through the actual causes in order of... Read more...
The Best Soaps for Body Odor After 50
The Best Soaps for Body Odor After 50
Past fifty, two things change in the shower: skin gets drier, and a new kind of odor — nonenal — stops responding to whatever bar is in the dish. Most... Read more...
HADAKI vs Persea vs Kyaori: The 2026 Persimmon Soap Comparison
HADAKI vs Persea vs Kyaori: The 2026 Persimmon Soap Comparison
Persimmon soap has gone from a Japanese specialty to a crowded shelf. Here is how the bars people actually search for — HADAKI, Kakiyu, Persea and Kyaori — line up... Read more...
Persimmon Soap Before and After: A Realistic Timeline
Persimmon Soap Before and After: A Realistic Timeline
Persimmon soap is not magic, and anyone who tells you the aging smell disappears in one shower is selling too hard. Here is the realistic timeline our customers report with... Read more...
How to Get Rid of Nonenal: 7 Methods, Ranked Honestly
How to Get Rid of Nonenal: 7 Methods, Ranked Honestly
Once you know the smell on your pillowcase is nonenal, the question is what actually removes it. Here are the seven approaches people try, ranked honestly. 1. Persimmon (kakishibu) soap... Read more...
Kakishibu: Japan's Fermented Persimmon Extract, Explained
Kakishibu: Japan's Fermented Persimmon Extract, Explained
Kakishibu is the fermented juice of unripe Japanese persimmons — a deep amber liquid that Japan has used for over a thousand years to waterproof wood, dye fabric, clarify sake... Read more...
Persimmon Soap 101: What It Is, How It Works, Who It Is For
Persimmon Soap 101: What It Is, How It Works, Who It Is For
Persimmon soap is a Japanese bathing staple built around one ingredient: kakishibu, the fermented juice of unripe persimmons. It exists for one specific job — removing the age-related body odor... Read more...
What Is Nonenal? The 'Aging Smell' Nobody Warns You About
What Is Nonenal? The 'Aging Smell' Nobody Warns You About
Around the age of 40, human skin begins producing a compound most people have never heard of: 2-nonenal. It is the molecule behind what is often called the “aging smell”... Read more...