What Is Persimmon Soap? A Plain-Language Guide

Persimmon soap has a quiet reputation. In Japan, it has been a familiar shelf item for years, bought by people who want to feel fresher as their skin changes with age. It is now catching on more widely. If you are wondering what it is and whether it is for you, this guide covers the basics.

What is persimmon soap?

Persimmon soap is a body cleanser made with extract from the persimmon fruit (Diospyros kaki). The fruit is rich in tannins, the same plant compounds that make an unripe persimmon taste dry and puckery. Persimmon soap pairs that extract with ordinary cleansing and moisturizing ingredients, so it washes like a regular bar or body wash.

Why persimmon?

Persimmon tannins are condensed tannins, large polyphenol molecules that readily bind to other molecules. In Japan, fermented persimmon tannin, known as kakishibu, has been used for generations to treat fabric, paper and wood.

In odor research, persimmon has been studied in a few ways:

• In lab tests described in a 1987 patent, persimmon juice reduced ammonia by 69.8% and trimethylamine by 98.8%.
• In a Japanese study of 100 people, a 1% persimmon tannin rinse lowered breath odor readings compared with water.

These studies were not done on skin, so they show why persimmon is used rather than proving what a soap does. We go deeper in Persimmon Tannins and Green Tea: What the Research Shows.

The goal is fresh skin, not covering one smell with another.

Where the age-related odor angle comes from

Japanese researchers named 2-nonenal in 2001, a compound linked to the scent of aging skin. The Japanese word kareishu (aging odor) became common, and persimmon soaps were marketed as a gentle daily option. If you want the science behind 2-nonenal, read What Is 2-Nonenal?

What to look for on the label

• Persimmon extract listed by name. On an ingredient list it often appears as Diospyros Kaki Fruit Extract.
• A moisturizing base. Skin after 40 tends to be drier. Ingredients like glycerin, shea butter, hyaluronic acid and plant oils help. The American Academy of Dermatology lists glycerin, hyaluronic acid and shea butter among helpful ingredients for dry skin.
• No harsh detergents. Look for formulas made without sulfates.
• A light scent. The goal is fresh skin, not covering one smell with another.

What is in the OVASI bar

Our Persimmon Body Bar is made with Japanese persimmon extract, coconut oil, olive oil, shea butter, glycerin and hyaluronic acid, finished with green tea extract, vitamin E and hydrolyzed collagen. It is made without sulfates or parabens.

How to use persimmon soap

1. Wet skin with warm, not hot, water.
2. Work up a lather between your hands or on a washcloth.
3. Focus on oil-rich areas: back, chest, neck, behind the ears and scalp line.
4. Leave the lather on for 30 to 60 seconds before rinsing so it has time to work through the oils.
5. Rinse well and pat dry. Keep the bar on a draining dish so it lasts longer.

For a full routine, see A Simple Shower Routine for Skin After 40.

Who is it for?

Persimmon soap suits anyone who wants a gentle, everyday cleanser with a fresh finish, and especially people over 40 who have noticed a change in how their skin or clothing smells. It is a cosmetic product, so it is used like any soap, as part of a normal routine.

What to expect

Skin should feel clean and comfortable after the first wash. Changes in scent are harder to judge, partly because people rarely notice their own. Give it a few weeks of daily use alongside clean bedding and clothing before deciding.

No soap is clinically proven to remove age-related odor, including ours. That is why the Persimmon Body Bar comes with a 60-day money-back guarantee.