Japan is famous for its incredibly complex etiquette rules. It may seem unnecessary to turn simple actions into ceremonies, but in Japan, for sure, no one is offended by this.
We at viral link have collected for you some rules of courtesy from Japan.
11. Addressing people
To address people by name is not enough in Japan. And the respectful title “-san” is only the tip of the iceberg. There are actually more honorific suffixes for addressing or referring to people:
“-kun” — a less formal honorific than the neutral “-san.” General use of “-kun” approximately means “friend.”