What should I pay attention to when going to Japan for a self-help tour?

According to my observation, China people who have lived in Japan for a period of time are all infected with the Japanese "don't like giving people trouble" and "don't like others giving me trouble". Therefore, don't ask him anything from the recommendation of scenic spots to how to buy subway tickets, which will consume their patience. For example, my husband recently urged me to write a Tokyo Raiders, so that if anyone asks questions in the future, I will throw him the link. It's not that I don't want to help my friends. Too many people ask. These are not complaints, but I think they are also some differences between China and Japan. I hope writing them down can comfort the hearts of friends who travel to Japan, because your friends may not care about you, but they have actually worked hard to entertain you.