Slim Stone
Slim Stone Warm Spa
Slim Stone Warm Spa
Rated out of 7.0 by Japan’s largest beauty community
A natural hot bath rich in germanium ore that warms you up and helps you sweat.
✓ 100% AUTHENTIC, SHIPS FROM JAPAN
✓ DUTIES & TAXES INCLUDED FOR US ORDERS
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What it is
This product contains a blend of natural minerals, said to enhance the effects of bathing, packaged in a nonwoven bag. Simply place the bag in the dedicated case, use the included string and suction cups, and place it in your bathtub. Enjoy a "germanium bath" and "enhanced bathing with various minerals" right in your own home bath. If the nonwoven bag containing the natural minerals is damaged, small pieces of the minerals may damage your bathtub. A warning is printed on the back of the package advising you to discontinue use. Can be used in conjunction with other bath additives. For hygienic reasons, we recommend rinsing and drying after use.
Ingredients
How to use
1. Refer to the back of the package and press the bottom of the case as shown in the illustration to remove the main body from the case. 2. Lightly rinse the removed main body (non-woven fabric). Do not remove the mineral from the main body (non-woven fabric). (Since natural minerals are used, the water may become slightly cloudy.) 3. Thread the included string from the hole at the bottom of the case to the hole at the top, and place the main body (non-woven fabric) in the case. Thread the string through the suction cup and tie it. 4. Attach the suction cup to a dry bathtub or hook the string to a faucet or other device to secure it. Fill the bathtub with hot water until the case is submerged. Can also be used with bath salts! To prevent accidents, do not use it directly on the bottom of the bathtub. Please use it a little away from the bathtub outlet, as it may be hot.
We ship internationally from Japan!
Frequently Asked Questions
Is this authentic?
Yes. We only buy from official retailers and directly from the brands here in Japan. Never resellers, never grey market stock.
We are beauty lovers too, so we know the worry, especially with something you are putting on your face. Authenticity is 100% guaranteed by us.
What are your shipping rates?
On orders under US$75, shipping is a flat US$20 to the United States and US$10 to all other countries.
Orders of US$75 or more ship free, applied automatically at checkout. Your exact shipping cost is shown before you pay.
How long does delivery take?
These estimates are for International Airmail (Tracked) and include 3 to 5 business days of processing in Japan.
- United States: 12 to 15 business days
- Canada, United Kingdom, France, Germany: 9 to 12 business days
- Australia, New Zealand, Denmark, Finland, India, Indonesia, Italy, Netherlands, Spain, Sweden, Switzerland: 10 to 13 business days
- China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, Thailand, Vietnam: 8 to 10 business days
- Rest of the world: 11 to 18 business days
Actual delivery can be affected by customs clearance, seasonal congestion, or carrier delays in the destination country, all of which are outside our control.
Do you offer express shipping?
Yes. As of 22 July 2026, we offer International Express Mail through Japan Post. The cost is based on order weight and is calculated automatically at checkout.
Will I pay customs or import fees?
US orders: No. As of July 1, 2026, all US orders ship DDP (duties delivered prepaid), meaning we prepay all import duties on our end. Nothing is due at your door.
Orders outside the US: Possibly. Duties and import taxes are set by your local customs authority and are not collected at checkout, so any charges on delivery are your responsibility.
We're working on rolling out prepaid duties for more countries soon.