Kakenyu Hot Water Rinse (かけ湯 - Kakenyu)
The ritual of scooping up hot water with a basin and splashing it over your body ('Kakenyu') right before stepping into the tub. It serves two purposes: rinsing off any remaining soap/dirt, and acclimating your skin to the high temperature.
An ancient thermal health wisdom preventing sudden blood pressure surges (heat shock) from hot water. It introduces the thermal spring temperature to your feet, legs, and chest safely before you submerge.
Approach the Kakenyu stone basin near the tub. Scoop water, splash it starting from your toes, working up your legs, belly, and shoulders (moving toward your heart) before slowly sliding into the tub.
What is the correct way to perform 'Kakenyu' right before stepping into the hot spring?