Japanese is a dichotomous language that includes what is expressed and what is not expressed. Hence, Japanese words always have hidden meanings. 

If people say “yes,” it means both “yes” and “no.” If you ask, “Do you like it?” They may say “yes.” Yet, it could mean “no.” It is not a lie but is an effort to avoid offending others by saying “no.” 

Then, how do you know the truth? Experience. Eventually, you will be able to guess hidden messages. Sometimes, however, experience is not enough. Then you will ask a third party about the hidden messages of your conversation partner.

Is Japanese life difficult? Yes. Do the Japanese trust each other? No. Are they OK with this kind of life? Yes, because they are used to it. They often read between the lines, which is a normal part of Japanese life.