Take a shower before going into the bathtub
Before you go into the bathtub, take a shower and clean your body with soap. The recommended way is to apply soap on your whole body first and then rinse all at once. Instead of using hot water, you should go for warm or cold water in the shower.
Once you are done with the shower and have cleaned your body thoroughly, you should not now dry up your body once. Make sure that you do not take any germs with you in the bathtub. Most of the people are lazy in drying their body, especially the sides, after shower. However, dry up each and every part of your body, even your back and feet.
Fill the bathtub with hot water
Warm water is preferred in western style baths but Japanese tend to use hot water (approximately 100 degrees Fahrenheit). Fill the bathtub with hot water but you must be a little careful as your skin may get very dry or burnt, if the water is too hot.
Go into the bathtub very slowly
Once the bathtub is ready, lower yourself in very slowly. Take your feet inside first and the rest of the body should follow. You will definitely find the water to be very hot at start; however, you will get used to it very soon.
Close your eyes, take some deep breaths and enjoy the Japanese bath in a western bathtub.