• Before and after: foot odor before, fresh feet after washing with the persimmon soap
  • Dr. Kakinagi compared with foot powder, spray and regular soap
  • It's not dirt, it's a molecule: isovaleric acid from a work boot and sock
  • The science behind it: the molecule, the boot, the persimmon tannin
  • How it works: lather, feet and toes for 60 seconds, rinse
  • What to expect with daily use
  • What's in the bar
1 9

Japanese Persimmon Foot Odor Soap

Dermatologist approvedJapanese KakishibuNeutralizes, Doesn't Mask90-Day Guarantee

It's not a hygiene problem. He showers every day. It's a molecule his skin makes inside his shoes. Regular soap doesn't get rid of it. Japanese persimmon does.

WARNING: Low Stock Notice. This product sold out 12 times last year. Take advantage of the limited sale and buy now. Ordering now helps you avoid future stock outs.
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Loved by 5,000+ happy feet

How does it work?

Foot sweat has no smell on its own. The problem starts inside his shoes.

After hours in closed boots, the bacteria that naturally live on his skin feed on that sweat and turn it into one molecule (isovaleric acid). That's the sour, cheese-like smell you notice the second his boots come off.

Regular soap only rinses the sweat. The molecule clings to his skin, so the smell comes right back.

Japanese persimmon tannin works differently. It captures that molecule and eliminates it, instead of covering it with perfume.

Does he have to change anything?

It's his shower bar. Same shower, same towel.

The only new step is one minute of lather on his feet.

Nothing else changes in his routine.

How do I use it?

Every day, in his regular shower:

  1. Lather. Wet the bar, slip it into the foam net and rub for about 10 seconds until you get a thick, creamy lather.
  2. Feet first. Wash the soles, the heels, the tops of the feet and especially between each toe. That's where the smell builds up the most.
  3. Let it sit 60 seconds. Leave the lather on his feet for one full minute. This is the step that makes the difference.
  4. Rinse and dry well. Rinse with warm water, then dry carefully, especially between the toes. Damp skin is where bacteria thrive.

Tips that help: wear clean socks every day, and leave his boots open overnight so they dry out. If he can, rotate two pairs of work boots.

Keep the bar on a draining soap dish between showers so it lasts longer.

Shipping and Returns

Shipping

Ships to the United States, the United Kingdom, Canada and Australia. Delivered in 7 to 12 business days.

90-Day Money-Back Guarantee

Try it in his real shower, on his real shifts. If you're not happy, email us at contact@drkakinagi.com within 90 days and we refund you. No need to send the bar back.

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Kakinagi portrait 29
Kakinagi famille 04
Kakinagi famille 02
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Kakinagi famille 03

What Changed in Their Homes

Sarah, 59

Sarah, 59

ok so i bought this mostly to shut my husband up about trying ANOTHER foot thing lol. he works 11 hour shifts in steel toes and i was so tired of the socks situation at night, like genuinely considered making him sleep in the guest room a few times. we're 3 weeks into Dr. Kakinagi and i havent had to say anything to him, which never happens. he says his boots dont even smell when he takes them off anymore which is the real test tbh bc those things were a biohazard before. we're actually doing feet on the couch again lol small win but a win. only thing is it took like a week before i noticed a real difference, wasnt instant

Marcus

Marcus

Play pickup basketball 4x a week, gym shoes, you know how that goes. Got to the point where I'd leave my shoes in the trunk instead of bringing them inside. Tried cedar inserts, freezing them, everything on some forum thread. Been on Dr. Kakinagi about a month, wash my feet with it after every session like normal soap. First time in years I've thrown my shoes in my gym bag without thinking twice. Not perfumed, just doesn't smell bad anymore

Miguel, 49

Miguel, 49

He works warehouse, on his feet 10 hours, same safety shoes every day bc thats just what you get issued. I'm the one who does the shoes-by-the-door enforcement in our house lol, by the door and nowhere else. Been on Dr. Kakinagi for like 6 weeks now and honestly I forgot to check for a while bc I just... stopped noticing anything, which is the whole point I guess. Asked him the other day and he said he genuinely forgets its even an issue now, used to think about it every single day after work

How it works

  • Step 1: Lather

    Wet the bar in the foam net and work up a thick lather.

  • Lathering his foot and between the toes with the Dr. Kakinagi bar

    Step 2: Feet and between the toes, 60 seconds

    Let the lather sit one minute before rinsing. That minute is the whole new routine.

  • Step 3: Rinse, dry, air the boots

    Dry between the toes. Leave the boots open overnight so they dry out too.

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You already know the evening.

He works on his feet all day. Steel toes, a warehouse, a route, a kitchen, a long shift.

He comes home, sits down, and the boots come off.

Three seconds later, the hallway knows. Then the couch. Then the laundry basket. Some nights, the sheets.

You've asked him to wash his feet. He did.

You've tried powder in the morning, spray at the door, baking soda in the boots. New boots, which smelled the same a month later.

The boots live in the garage now. That's not a fix. That's a holding pattern.

And here's the part that doesn't add up: he showers every day. The rest of him smells like him. His feet still clear the room.

He comes home and the work boots come off

He isn't dirty. And he isn't lying.

Most women land on the same explanation: he isn't washing properly.

Then you watch him scrub, with soap. And by the time he's on the couch, it's back.

Foot sweat has no smell. The odor is made afterward, by normal bacteria that live on everyone's skin.

They feed on sweat and turn it into one molecule: isovaleric acid. The same molecule you'll find in strong cheese.

That's why his feet don't smell like dirt. They smell like cheese, vinegar, something sour you can't quite name.

And he really can't smell it. The nose tunes out what comes from its own body. You get the hit at the door. He doesn't.

So you can stop having that argument. You were never going to win it, and you don't need to.

He scrubs his feet with soap, and the smell still comes back

Twelve hours in a boot is twelve hours of that molecule being made.

Closed shoes, all day, warm and damp. The bacteria stay, the sweat keeps coming, the molecule keeps forming.

By the time the laces come undone, it's on his skin, in his socks, and soaked into the boot.

And everything you've tried was built for something else:

  • Regular soap rinses the sweat. The molecule stays behind.
  • Powder dries his feet in the morning. The molecule is made all afternoon.
  • Spray and cologne cover it. Often they mix with it, and now there are two smells.
  • New boots just fill back up. They hold what his feet put in them.

You can't clean your way out of something his skin rebuilds every single shift.

The couch, the laundry, the hallway are where it lands. Not where it starts.

Powder, spray, baking soda, new boots: everything she already tried

Persimmon tannin doesn't cover the molecule. It grabs it.

In Japan, fermented persimmon tannin, called kakishibu, has been used against odor for centuries. Not as a perfume. As a tannin.

Tannins bind. In lab tests, persimmon tannin captures isovaleric acid, the cheese molecule behind foot odor, instead of scenting over it.

If you've ever had him soak his feet in black tea, you were already reaching for a tannin. This one lives in a bar of soap. No basin on the bathroom floor.

Dr. Kakinagi puts it where he already washes. His shower bar, for his feet and the rest of him.

Fermented persimmon tannin (kakishibu), ripe persimmons and the Dr. Kakinagi soap bar

Why Not Just Another Powder or Spray?

  Powders & sprays

Targets the odor molecule

No perfume to cover it up

Part of the shower he already takes

Nothing to reapply during the day

Japanese persimmon tannin

90-day money-back

FAQ

Questions she actually asks

He already uses soap. Why would this be different?

Most soap is there to rinse sweat and oil. Foot odor is a molecule bacteria make after the sweat is out. Persimmon tannin is in this bar because, in lab tests, it captures that molecule instead of perfuming it.

Will it stop the sweating?

No, and it doesn't need to. Sweat isn't the smell. The smell is what bacteria make from sweat inside a hot boot.

Isn't it his boots?

The boots are half of it. They store what his feet leave in them all day. Dry them overnight and rotate two pairs if you can.

But if his skin keeps making the molecule, a clean boot fills right back up. Start with the skin.

What if it's athlete's foot?

If there's itching, peeling, cracking between the toes or small pits on the soles, see a doctor or pharmacist. This is a soap, not a treatment.

He'll take it the wrong way.

Then don't announce it. It's a bar of soap in the shower, not a verdict.

Most men can't smell their own feet. They're not refusing to help, they just don't get the signal you get.

How soon should I judge it?

Not after one night. Use it every day, with the minute on the feet, and let the boots dry. You have 90 days, not 90 hours.

Can he use it on the rest of his body?

Yes. It's his everyday shower bar, head to toe.

Does it have a scent?

No added perfume. The goal is no smell, not a different smell.

Our son has the same problem after practice.

That's what the second bar in the Buy 1 Get 1 is for. Same rule: it helps someone who actually showers.

Why does it cost more than a $6 spray?

A spray goes on the boot or the sock, fades, and gets rebought every few weeks. This is the bar he uses every time he showers, for his feet and his whole body.

How do I get a refund?

Email us within 90 days of delivery at contact@drkakinagi.com. No need to send the bar back.

How do I contact you?

Email us at contact@drkakinagi.com. A real person replies within 24 hours.