When you communicate in Japan, your relationship to the other person determines everything about how you interact. Are they older or younger? Senior or junior? Higher status or lower?
These questions shape what language you use, when you speak, what topics you can raise, and what level of deference or authority is appropriate. Japanese includes an elaborate system of honorifics that requires you to make these choices with every sentence.
This is not experienced as burden but as helpful clarity. When everyone understands their relative position, interaction proceeds smoothly because expectations are shared. Pay attention to establishing relative standing early in any relationship. Once positions are clear, appropriate communication follows naturally.