① Comfort of use
② Likelihood of continued use
③ Ability to share with family

Please use "If I can continue this" as your deciding factor for purchase.

Yes. After the 7-day trial, you can return it if you wish. We do not push for purchases or engage in persistent sales.

You can create a hot stone spa experience at home whenever you want, without needing a reservation or travel. Even on days when going out is difficult, or when you come home exhausted, you have a place at home to take care of yourself. That sense of security is the appeal of having TERA-HEAT at home.

TERA-HEAT is a home-use ceramic hot stone spa product that uses ceramic tiles manufactured with UPONE's proprietary method. In the 13 years since our founding, we have delivered over 6,000 units, and it has also been adopted by over 100 clinics and salons nationwide (as of 2026).

TERA-HEAT does not aim for intense heat or perspiration, but rather values the time spent relaxing in comfortable warmth. "Comfortable" rather than "hot." The appeal of TERA-HEAT is its ability to create a warming experience that is easy to incorporate into daily life and simple to continue.

When using the full body type for 30 minutes, the electricity bill is estimated to be around 3-4 yen. Even with daily use, the monthly electricity bill is approximately 120 yen. The main monthly running cost is only electricity.

It can be used on flat surfaces such as wooden flooring, tatami mats, and carpets. Initially, try using it for about 15 to 30 minutes at a time, within a comfortable range. Please use it at a temperature setting that you find comfortable.

Children, the elderly, and those with weakened physical strength should start with a lower temperature and shorter duration. If you are undergoing medical treatment, have a chronic illness, or are pregnant, please consult your doctor in advance before use.

*TERA-HEAT is not a medical device. It is not intended for the treatment, diagnosis, or prevention of diseases.

Yes, there is a 3-year warranty after purchase.

Please feel free to contact us by phone, email, or LINE. We don't just deliver the product; we support you so you can continue to use it with peace of mind.

Yes. Please feel free to contact us. We never engage in aggressive sales. We can also send you materials.