This is the “Sauna Watch,” a wristwatch designed for sauna enthusiasts. It features unique functions and design for safe use even in high temperature and humidity environments. Switch between sauna mode and normal time mode with a single button. Even those who forget how long they’ve been in the sauna can easily use the 12-minute timer in sauna mode. The simple dial and luminous hands allow you to check the time even in a dark sauna room. It is heat and humidity resistant, so you can wear it safely in saunas below 100℃, and the heat-resistant battery prevents heat from transferring to heat-sensitive internal components. The exterior parts are made of resin to avoid burns, and the only metal screw is designed not to come into contact with the skin. The resin used is resistant to moisture, so the inside of the watch is less likely to fog up. The curl band, inspired by sauna locker keys, allows you to subtly feel the sauna even in everyday life. *The luminous paint’s glow time and brightness vary depending on the intensity and duration of light absorbed. *If the watch is rapidly cooled after a sauna, it may fog up, but if the fog disappears within a few minutes, it is not a malfunction. *Please refrain from using the watch in high-temperature environments other than saunas. Also, when using it in a sauna, please limit use to 15 minutes or less while wearing it on your arm.

specification
basic information
Release date
October 2025
price
Manufacturer’s suggested retail price:  ¥16,500 (tax included)
Case dimensions (height x width x thickness)
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40.2 × 35.4 × 12.9 mm
mass
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25 g
Case/Bezel Material
resin
band
resin
waterproof
5 ATM water resistance
Power supply/battery life
Battery life: about 5 years
Exterior
glass
inorganic glass
Band size
Free
Clock function
timer
Sauna mode (12-minute timer) Measurement unit: 1 second, Measurement range: 12 minutes
accuracy
Average monthly difference: ±15 seconds
others
Usable environment: Sauna with a set temperature of up to 100℃ (use for no more than 15 minutes while worn on the arm)