How to take a bath in the public hot springs in other hotels in Japan?

The habit of taking a bath is very different from that of people in China. If you don't follow the habits there, you will be laughed at or persuaded to leave the bathhouse. First of all, don't take a shower directly after you go in. Because the body is not very clean, you should wash the whole body at the shower head first, apply bathing agent and then take a bath. It is absolutely forbidden to wash your whole body with soap when taking a bath. Hot springs in Japan are only used for bathing. You can't bring anything into the bathroom.